# David Veksler's Cheatsheets

> A collection of 150+ interactive, standalone HTML reference guides spanning technology, AI safety, finance, martial arts, philosophy, health, and practical life-admin topics. Each page is a self-contained, terminal reference for its topic — dense, comprehensive, and built to let a competent practitioner do real work from a single page. The site is produced by a governed, git-audited agentic-AI content pipeline (see how-its-built.html).

The strongest pages are curated first; the full index, grouped by category, follows. Each entry links to the live page with a one-line description drawn from that page's own metadata.

The complete machine-readable index of every page lives at https://cheatsheets.davidveksler.com/llms-full.txt.

Structured catalog (JSON): https://cheatsheets.davidveksler.com/catalog.json — every page with its title, description, keywords, category, section headings with deep-link anchor ids, cross-links, and first/last commit dates.

Category hub pages, one per field, each server-rendered with its own title, description, editorial intro and a start-here list: AI & Safety (https://cheatsheets.davidveksler.com/ai-safety), Software & DevOps (https://cheatsheets.davidveksler.com/software-devops), Security & Privacy (https://cheatsheets.davidveksler.com/security-privacy), Risk & Preparedness (https://cheatsheets.davidveksler.com/risk-preparedness), Bitcoin & Finance (https://cheatsheets.davidveksler.com/bitcoin-finance), Crypto Custody & Compliance (https://cheatsheets.davidveksler.com/crypto-custody), Martial Arts & Strategy (https://cheatsheets.davidveksler.com/martial-arts), Firearms & Military (https://cheatsheets.davidveksler.com/firearms-military), Radio (https://cheatsheets.davidveksler.com/radio), Health & Fitness (https://cheatsheets.davidveksler.com/health-fitness), Economics & Politics (https://cheatsheets.davidveksler.com/economics-politics), Philosophy & Religion (https://cheatsheets.davidveksler.com/philosophy-religion), Engineering & Science (https://cheatsheets.davidveksler.com/engineering-science), Home & Lifestyle (https://cheatsheets.davidveksler.com/home-lifestyle), Life Admin & Consumer Defense (https://cheatsheets.davidveksler.com/life-admin).

## Strongest pages (curated)

The pages with the most demonstrated search and AI-assistant demand — dense comparison tables with exact specs, device programming references, and procedure guides a reader keeps open while working.

- [Frontier AI Companies & Labs (2026)](https://cheatsheets.davidveksler.com/ai-frontier.html): Every frontier AI lab and model as of 2026 — OpenAI, Anthropic, Google DeepMind, xAI, Meta, Mistral, DeepSeek — philosophy, funding, products, and AGI goals.
- [Humanoid Robots 2026](https://cheatsheets.davidveksler.com/humanoid-robots.html): Optimus, Figure 03, Atlas, Digit, Unitree and more — height, payload, battery, actuators, price and ship date for every humanoid robot program.
- [Open-Weight AI Models](https://cheatsheets.davidveksler.com/open-weight-ai-models.html): Llama, Qwen, DeepSeek and Mistral compared — licenses, sizes, hardware requirements, and deployment tradeoffs.
- [AI Model API Pricing](https://cheatsheets.davidveksler.com/ai-model-api-pricing.html): Per-token pricing, context windows, and rate limits across the major AI model APIs.
- [Rocket Size Comparison](https://cheatsheets.davidveksler.com/orbital-rockets-comparison.html): Starship, New Glenn, Falcon Heavy, Falcon 9, Ariane 6, Vulcan and Long March 5 side by side — payload to LEO, height, thrust, reuse, cost and status.
- [Space Habitats and Life Support](https://cheatsheets.davidveksler.com/space-habitats-life-support.html): Atmosphere, CO2 removal, water recycling, thermal control, radiation shielding, and the tradeoffs that keep crews alive.
- [Boom Supersonic](https://cheatsheets.davidveksler.com/boom-supersonic.html): The Overture airliner, XB-1 demonstrator, Symphony engine, specs, timeline, and sustainability goals.
- [Tesla Products & Specs](https://cheatsheets.davidveksler.com/tesla-products.html): Full Tesla lineup specs — Model 3, Y, S, X, Cybertruck, Semi, Roadster and Optimus — battery chemistry, range, drivetrain, platform and pricing in one table.
- [Baofeng UV-5R Quick Reference](https://cheatsheets.davidveksler.com/baofeng-uv5r-quick-ref.html): Beginner-friendly visual programming guide for the Baofeng UV-5R with key guides, screen icon definitions, and step-by-step programming.
- [Baofeng UV-5R Guide: Ham, Emergency & GMRS](https://cheatsheets.davidveksler.com/baofeng-uv5r-ham-guide.html): Manual programming, ham radio protocols, disaster communication plans, and FRS/GMRS walkie-talkie setup.
- [Linux Server Hardening](https://cheatsheets.davidveksler.com/linux-server-hardening.html): An interactive hardening checklist with copy-paste commands — SSH keys, ufw, fail2ban, systemd sandboxing, sudo, and sysctl.
- [Compression Algorithms Compared](https://cheatsheets.davidveksler.com/compression-algorithms.html): Choosing lossless, lossy, archive, web, image, audio, and video codecs by ratio, speed, cost, and support.
- [Google AI Studio Settings](https://cheatsheets.davidveksler.com/google-ai-studio-guide.html): Every Google AI Studio setting explained — temperature, top-p, top-k, stop sequences, safety filters, and when to change each default.
- [Bitcoin Whitepaper Explained](https://cheatsheets.davidveksler.com/bitcoin-whitepaper.html): Satoshi's whitepaper section by section — transactions, proof-of-work, SPV, incentives and privacy — in plain English.
- [Veterinary Diagnostics](https://cheatsheets.davidveksler.com/veterinary-diagnostics.html): Veterinary diagnostic terminology and tests — lab procedures, imaging, and key animal healthcare terms.
- [Shabbat Evening Service](https://cheatsheets.davidveksler.com/shabbat-services-cheatsheet.html): Follow-along guide to Kabbalat Shabbat and Ma'ariv — key prayers, Hebrew names, themes, and Reform/Conservative/Orthodox flows.
- [Ashihara Karate](https://cheatsheets.davidveksler.com/ashihara-karate.html): The sabaki circular-movement system, strikes, blocks, kicks, and all kata by belt rank, with drills and a trackable syllabus.
- [Brazilian Jiu-Jitsu](https://cheatsheets.davidveksler.com/brazilian-jiu-jitsu.html): Positions, guards, passes, submissions, escapes, training structure, and etiquette with progress tracking.
- [Judo Guide](https://cheatsheets.davidveksler.com/judo.html): Throws (Nage Waza), groundwork (Katame Waza), Kuzushi and Kumi Kata principles, Ukemi, and a trackable syllabus.
- [Special Forces Loadouts & EDC Gear](https://cheatsheets.davidveksler.com/operator-loadouts.html): Real loadouts by role — SWAT entry, special forces, paramedic and EDC — itemised with weights and tradeoffs.
- [Samsung Bespoke Wall Oven Master Guide](https://cheatsheets.davidveksler.com/samsung-bespoke-oven-guide.html): Manual-based reference for the NQ70CB700D12AA combo wall oven — steam, air fry, Flex Duo, cleaning steps, and error codes.
- [How This Site Is Built](https://cheatsheets.davidveksler.com/how-its-built.html): How 150+ reference pages are produced by a governed, multi-agent Claude Code pipeline with a binding spec and git audit trail.

## AI & Safety

- [AGI Development: Paths to Artificial General Intelligence](https://cheatsheets.davidveksler.com/agi-development-guide.html): Comprehensive AGI development guide covering core dynamics, forecasting grids, alignment risks, hardware bottlenecks, and governance levers across rapid and gradual takeoff scenarios.
- [AI Coding Agents Compared: Claude Code, Cursor, Copilot](https://cheatsheets.davidveksler.com/ai-coding-agents-compared.html): Compare AI coding agents in 2026: Claude Code, Cursor, Copilot, Codex, Windsurf, Gemini CLI, Aider, Cline, Kiro and Zed on pricing, models, and SWE-bench.
- [AI Existential Risk Cheatsheet: AGI, Safety & Mitigation](https://cheatsheets.davidveksler.com/airisk.html): Comprehensive cheatsheet on AI Existential Risk (X-Risk): Understanding AGI, ASI, the alignment problem, risk scenarios, core challenges, mitigation strategies, and AI safety resources.
- [AI Models Compared: Which Model Should You Use?](https://cheatsheets.davidveksler.com/ai-models-compared.html): A decision hub for choosing an AI model: compare models by task, cost and openness, then jump to deep dives on model picking, API pricing, coding agents, open weights and prompting.
- [AI Progress Live Dashboard](https://cheatsheets.davidveksler.com/ai-progress-dashboard.html): Dashboard tracking AI progress across four benchmarks (SWE-bench Verified, METR time horizons, Artificial Analysis, and training compute), with charts, synthesis, and delta-vs-last-visit tracking.
- [AI Safety & Existential Risk: A Field Guide](https://cheatsheets.davidveksler.com/ai-safety-existential-risk.html): A field guide to AI existential risk and x-risk: the core case, a p(doom) estimate, the key thinkers and governance, plus a concept glossary and links to every deep-dive cheat sheet.
- [Frontier AI Labs List: Companies, Models & Strategy (2026)](https://cheatsheets.davidveksler.com/ai-frontier.html): Compare major frontier AI labs: OpenAI, Anthropic, Google DeepMind, xAI, Meta, Mistral, and DeepSeek. Models, access, strategy, safety posture, and primary sources.
- [Google AI Studio Settings: Temperature, Top-P & Advanced](https://cheatsheets.davidveksler.com/google-ai-studio-guide.html): Every Google AI Studio setting explained: temperature, top-p, top-k, stop sequences, safety filters, system instructions, and when to change each default.
- [Governing Agentic AI: Guide for Software Organizations](https://cheatsheets.davidveksler.com/governing-agentic-ai.html): Turning scattered AI use into a shared, reviewed capability: the Golden Rule, four safety invariants, a reviewed-skill lifecycle, and a maturity path.
- [How This Site Is Built: A Governed Agentic-AI Pipeline](https://cheatsheets.davidveksler.com/how-its-built.html): How 150+ interactive reference pages are produced by a governed, multi-agent Claude Code pipeline: a binding spec, model delegation, and a git audit trail.
- [Interactive AI Safety Ecosystem Hub (List & Map)](https://cheatsheets.davidveksler.com/aisafety.html): Explore the AI Safety ecosystem: A comprehensive, interactive directory and visual map of labs, research groups, policy orgs, funding, and resources. Toggle between list and map views.
- [p(doom) Calculator Test Harness](https://cheatsheets.davidveksler.com/p-doom-test-harness.html): Internal test harness comparing p(doom) calculator formula variants (multiplicative, weighted, square-root dampening) to fix miscalibrated slider output.
- [p(doom) Calculator: AI Existential Risk Assessment Tool](https://cheatsheets.davidveksler.com/p-doom-calculator.html): An interactive calculator estimating AGI-caused existential catastrophe probability: explore AI safety arguments and assess your own p(doom) risk score.
- [System Prompt Builder Tool & Engineering Guide | AI Prompter](https://cheatsheets.davidveksler.com/prompt-builder.html): Build & engineer effective LLM system prompts with our interactive tool. Includes a full guide & templates for AI, prompt engineering, code review, and more.
- [Timeline of a Potential Apocalypse: AI Existential Risk](https://cheatsheets.davidveksler.com/ai-risk-timeline.html): A visual timeline of AI existential risk: from Turing's predictions to superintelligence, the alignment problem, and key figures Yudkowsky, Bostrom, and Hinton.
- [Which AI Model Should I Use? Anthropic & OpenAI Model Picker](https://cheatsheets.davidveksler.com/ai-model-picker.html): Which Anthropic or OpenAI model to use in 2026: Haiku, Sonnet, Opus, Fable, and GPT-5.4/5.5 tiers, the effort knob, and where the quality gap shows up.
- [Yudkowsky: Rationality, AI & The Sequences Cheatsheet](https://cheatsheets.davidveksler.com/yudkowsky-rationality-ai-cheatsheet.html): Eliezer Yudkowsky's core ideas: rationality, AI alignment, p(doom), the Orthogonality Thesis, and a guide to 'The Sequences' on Bayesian reasoning and biases.

## Software & DevOps

- [.NET & C# Cheatsheet: SDK, ASP.NET Core, EF Core, MAUI](https://cheatsheets.davidveksler.com/dotnet-cheatsheet.html): Comprehensive .NET and C# cheatsheet covering .NET 10, C# 14, CLI commands, project files, ASP.NET Core, EF Core, MAUI, Aspire, deployment, diagnostics, and architecture.
- [.NET Clean Architecture: Layered Web API Cheat Sheet](https://cheatsheets.davidveksler.com/clean-architecture-dotnet.html): Clean Architecture in .NET Web API: domain, application, infrastructure and API layers, dependency rules, CQRS, EF Core placement and testing strategy.
- [A Modern DevOps Pipeline Cheatsheet](https://cheatsheets.davidveksler.com/modern-devops-pipelines.html): A modern DevOps pipeline cheatsheet covering the lifecycle from SCM, CI and CD to monitoring, comparing Azure DevOps and GitHub Actions with Terraform.
- [API Design: REST, GraphQL, gRPC, and Webhooks](https://cheatsheets.davidveksler.com/api-design-rest-graphql-grpc-webhooks.html): Choose REST, GraphQL, gRPC, or webhooks with clear tradeoffs: methods, schemas, auth, pagination, caching, idempotency, retries, and the failure modes that matter.
- [AWS vs Azure (2026): Cloud Architect's Comparison](https://cheatsheets.davidveksler.com/aws-vs-azure.html): AWS vs Azure (2026): side-by-side comparison for architects — EC2, S3, Lambda vs Azure VMs, Blob, Functions, Logic Apps, Step Functions, AI services, and costs.
- [Azure DevOps Cheatsheet: From Boards to Pipelines](https://cheatsheets.davidveksler.com/azure-devops.html): A comprehensive, opinionated cheatsheet for the entire Azure DevOps ecosystem. Covers Azure Boards, Repos, Pipelines, Test Plans, Artifacts, Terraform for IaC, and SonarQube for code quality.
- [Compression Algorithms Compared: Codecs, Ratios, Tradeoffs](https://cheatsheets.davidveksler.com/compression-algorithms.html): A practical data compression algorithms cheatsheet for choosing lossless, lossy, archive, web, image, audio, and video codecs by ratio, speed, cost, and support.
- [Database Comparison: SQL, NoSQL, Search and Vector DBs](https://cheatsheets.davidveksler.com/databases.html): Compare relational, document, key-value, graph, column and vector databases: consistency, scaling, query model, and which workload each one actually fits.
- [Git Cheatsheet: Commands & Workflows](https://cheatsheets.davidveksler.com/git-scm.html): A comprehensive interactive Git cheatsheet covering essential commands, setup, branching, merging, remotes, Gitflow, and advanced tools. Perfect for quick reference and learning Git.
- [Git Internals: Objects, Refs & the DAG](https://cheatsheets.davidveksler.com/git-internals.html): Git from first principles: the content-addressable object model (blobs, trees, commits, tags), refs and HEAD, the index, and porcelain-to-plumbing mapping.
- [JavaScript for Architects: Modern JS, React & Ecosystem](https://cheatsheets.davidveksler.com/javascript-for-architects.html): Modern JavaScript for architects: ES2026 syntax, async patterns, React and framework tradeoffs, bundlers, testing, and the decisions that outlive frameworks.
- [Microservices Decisions: An ADR-Lite Cheatsheet](https://cheatsheets.davidveksler.com/microservices.html): A decision-oriented microservices cheatsheet: service boundaries, sync vs async, event-driven patterns, saga/CQRS/outbox data patterns, and failure handling.
- [Modern Version Control: Git, Mercurial & Hosting](https://cheatsheets.davidveksler.com/versioncontrol.html): An interactive cheatsheet comparing Git and Mercurial plus hosting platforms (GitHub, GitLab, Bitbucket, Azure DevOps): core concepts and key workflows.
- [Observability: Logs, Metrics, Traces & SLOs](https://cheatsheets.davidveksler.com/observability-logs-metrics-traces-slos.html): A vendor-neutral observability field guide: when to use logs, metrics, traces, SLOs, and OpenTelemetry; how to avoid cardinality and alert-fatigue traps; and where Datadog and New Relic fit.
- [PostgreSQL Cheat Sheet: Commands, Tuning and Advanced SQL](https://cheatsheets.davidveksler.com/postgresql.html): PostgreSQL reference for DBAs and developers: psql commands, indexing, EXPLAIN plans, vacuum, replication, window functions, JSONB and performance tuning.
- [Python for Architects: Patterns, Frameworks & Systems 3.14+](https://cheatsheets.davidveksler.com/python-for-architects.html): A Python 3.14+ cheatsheet for architects and senior developers: architectural patterns, Django/Flask/FastAPI, data handling, concurrency, and security.
- [Software Development Guides: Architecture, .NET & DevOps](https://cheatsheets.davidveksler.com/software-development-guides.html): A curated software development guide index for architecture, .NET, API design, DevOps, observability, data, version control, JavaScript, Python, and cloud topics.
- [SQL Performance Tuning: Indexes, Plans & Joins](https://cheatsheets.davidveksler.com/sql-performance-tuning.html): Diagnose slow SQL with execution plans, indexes, join strategy, statistics, cardinality, pagination, locks, caching, and concrete PostgreSQL/MySQL tuning examples.
- [The Scrum Framework Cheatsheet: Agile Project Management](https://cheatsheets.davidveksler.com/scrum.html): A comprehensive and interactive cheatsheet for the Scrum framework. Understand Scrum roles, events, artifacts, values, and pillars to enhance your agile project management.
- [Ubuntu Linux for AI & Agentic Developers: Setup & Workflow](https://cheatsheets.davidveksler.com/ubuntu-linux-for-ai-developers.html): A paste-ready Ubuntu setup cheatsheet for AI developers: Python via uv, Node LTS, Docker, NVIDIA GPU/CUDA, Ollama, Claude Code, WSL2, and common anti-patterns.

## Security & Privacy

- [Comprehensive Guide to Post-Quantum Cryptography](https://cheatsheets.davidveksler.com/post-quantum-cryptography.html): A comprehensive, interactive guide to post-quantum cryptography: NIST-standardized algorithms, hardware and migration strategies, known exploits, and geopolitical and Bitcoin implications.
- [Linux Server Hardening: Checklist & Paste-Ready Commands](https://cheatsheets.davidveksler.com/linux-server-hardening.html): An interactive Linux/Ubuntu/Debian hardening checklist with copy-paste commands: SSH keys, ufw firewall, fail2ban, systemd sandboxing, sudo, and sysctl.
- [Passkeys, YubiKeys, and Hardware Auth: Security Guide](https://cheatsheets.davidveksler.com/passkeys-yubikeys-hardware-auth.html): Practical guide to passkeys, YubiKeys, WebAuthn, recovery codes, synced vs device-bound credentials, and lockout-safe rollout plans for personal or team accounts.
- [Personal Cybersecurity: A Practical Threat-Model Checklist](https://cheatsheets.davidveksler.com/personal-cybersecurity.html): A personal cybersecurity checklist: password manager, phishing-resistant MFA and passkeys, email/phone lockdown, device encryption, and breach response.
- [Privacy: Data Broker Opt-Out Guide](https://cheatsheets.davidveksler.com/privacy-data-broker-opt-out.html): A comprehensive, step-by-step USA guide to removing your personal information from data brokers, people-search sites, and professional data aggregators.

## Risk & Preparedness

- [Celestial Navigation: Find Your Position Without GPS](https://cheatsheets.davidveksler.com/celestial-navigation.html): Find your position with a sextant, a watch, and a book - no electronics. Noon-sight worksheet, sextant corrections, sight reduction, dead reckoning, and no-instrument emergency methods on one page.
- [Creator Threat Model: Security for Public Figures](https://cheatsheets.davidveksler.com/creator-public-figure-threat-model.html): A practical security manual for creators and public figures: account takeover, doxxing, impersonation, swatting, payment fraud, home privacy, and escalation planning.
- [Home Safes: What They Stop (RSC, TL-15, Fire Ratings)](https://cheatsheets.davidveksler.com/safes-what-they-stop.html): Most consumer safes are rated for just 5 minutes against hand tools. RSC, TL-15, and UL 72 fire classes decoded -- what each rating buys, who needs it, and why bolting down beats every lock upgrade.
- [How Burglars Break In — and What Stops Them](https://cheatsheets.davidveksler.com/how-burglars-break-in.html): Sourced from convicted-burglar interviews and BJS crime data: how break-ins actually happen, what actually deters a burglar, and what is security theater.
- [How to Survive Nuclear Fallout: Kearny's Guide, Modernized](https://cheatsheets.davidveksler.com/nuclear-preparedness.html): Outside the blast radius, survival is decided by your first hour and next two weeks. The 7-10 decay rule, PF math, Kearny shelters, and 14-day life support: no fatalism, no tacticool.
- [Is That Actually Dangerous? The Security Theater Audit](https://cheatsheets.davidveksler.com/security-theater-audit.html): Juice jacking, RFID skimming, listening phones, hotel safes, public Wi-Fi - each fear graded REAL, EDGE CASE, or THEATER by documented victim counts, plus the boring threats worth your attention.
- [Prepper Gear vs. Reality: What Emergencies Actually Require](https://cheatsheets.davidveksler.com/prepper-gear-audit.html): Rank your real emergencies, audit your prepper gear, build honest 72-hour and two-week kits, size backup power, and choose skills before catalog cosplay.
- [The Actual Risk Dashboard: What Kills People, in Micromorts](https://cheatsheets.davidveksler.com/actual-risk-dashboard.html): Everyday risk in micromorts on one dashboard: driving, skydiving, childbirth, anesthesia, what actually kills people by age, and the gap between real risks and headlines.
- [The Parent's Threat Model: What Actually Endangers Kids](https://cheatsheets.davidveksler.com/parents-threat-model.html): Vehicles, water, unsecured firearms, and falls - not vans and strangers. Real childhood risk rankings by age, scripts for awkward safety questions, and what to stop over-weighting.
- [Vehicle Emergency Kit: Roadside, Winter, Heat & Evacuation](https://cheatsheets.davidveksler.com/vehicle-emergency-kit.html): Build a realistic vehicle emergency kit for breakdowns, flat tires, dead batteries, winter storms, heat, evacuation, kids, pets, medications, and roadside safety.

## Bitcoin & Finance

- [Bitcoin Exchanges & Crypto Cards: On-Ramps & Spending Guide](https://cheatsheets.davidveksler.com/bitcoin-exchanges-cards.html): Choosing Bitcoin exchanges for buying and selling (Coinbase, Kraken, Gemini, Swan) and crypto cards for spending (Coinbase Card, Fold): fees, security, risks.
- [Bitcoin Self-Custody: Security Guide From Plebes to Whales](https://cheatsheets.davidveksler.com/bitcoin-self-custody-guide.html): A Bitcoin self-custody guide that scales from everyday holders to whales: securing against loss and theft, recoverability, tools, and the threat landscape.
- [Bitcoin Wallet Cheatsheet: Secure Your Crypto](https://cheatsheets.davidveksler.com/bitcoin-wallet.html): Bitcoin wallets explained: securing keys with hardware and cold storage, self-custody, hardware comparisons (Trezor, Coldcard, Ledger), and advanced concepts.
- [Bitcoin Whitepaper Explained: A Plain-English Guide](https://cheatsheets.davidveksler.com/bitcoin-whitepaper.html): Satoshi's Bitcoin whitepaper section by section: transactions, proof-of-work, SPV, incentives and privacy, with plain-English notes and modern protocol context.
- [Global Monetary Standards: The Quest for Sound Money](https://cheatsheets.davidveksler.com/currency-timeline.html): A visual history of monetary standards: commodity money, classical coinage, the Gold Standard, the Fiat Experiment, and Bitcoin as digital sound money.
- [Housing Comparison: From Basic to Billionaire](https://cheatsheets.davidveksler.com/housing-comparison.html): How housing budgets translate to real living standards: from $500 shared rooms to $60K+ luxury estates, compare amenities, brands, and lifestyle choices.
- [Index Investing & Tax-Advantaged Accounts: 2026 Cheat Sheet](https://cheatsheets.davidveksler.com/index-investing-tax-advantaged.html): Index investing and tax-advantaged accounts for 2026: a compound-interest/FIRE calculator, asset allocation by age, a 401k/IRA/Roth/HSA funding waterfall.
- [Lifestyle Calculator: What Your Family's Income Really Buys](https://cheatsheets.davidveksler.com/lifestyle-calculator.html): How family income translates to real lifestyle choices: from $20K to $25M+, see what your household can afford across categories, cost-of-living adjusted.
- [The Cliff Map: IRMAA, ACA, and Income Thresholds](https://cheatsheets.davidveksler.com/the-cliff-map.html): Every US income cliff on one page: IRMAA Medicare surcharges, ACA subsidies, Social Security taxation, credit phase-outs, FAFSA, and MAGI traps for 2026.

## Crypto Custody & Compliance

- [Crypto Custody Architecture: Who Owns Which Decision](https://cheatsheets.davidveksler.com/crypto-custody-index.html): Cluster entry point crossing 34 operating decisions against five custody models, with responsibility ownership, failure outcomes, and incident routing.
- [Blockchain Deposits & Withdrawals: Finality and Operations](https://cheatsheets.davidveksler.com/blockchain-deposits-withdrawals.html): Practical reference for chain finality, confirmations, EVM nonces, UTXO selection, gas funding, deposit identity, idempotency, and reconciliation failures.
- [Crypto Compliance Architecture: KYT, Travel Rule, IVMS101](https://cheatsheets.davidveksler.com/crypto-compliance-architecture.html): Place KYT, sanctions, Travel Rule, and policy gates correctly; implement an IVMS101 field map and payload; and handle alerts without signing irreversible transfers.
- [Crypto Exchange Architecture: Ledger, Matching, Wallet Boundary](https://cheatsheets.davidveksler.com/crypto-exchange-architecture.html): Design a crypto exchange around deterministic matching, a double-entry ledger, wallet-boundary invariants, deposit and withdrawal pipelines, reconciliation, and proof of reserves.
- [Fireblocks & Custody Provider Integration Patterns](https://cheatsheets.davidveksler.com/custody-provider-integration.html): Integrate Fireblocks and custody platforms safely: vault models, idempotent transaction APIs, co-signer callbacks, webhooks, status/sub-status handling, gas stations, and exit tests.
- [Institutional Crypto Custody: Tiers, Controls, and CCSS](https://cheatsheets.davidveksler.com/institutional-crypto-custody.html): Design institutional digital-asset custody tiers, hot-wallet float, policy engines, dual control, key ceremonies, disaster recovery, and a CCSS v9.0 control crosswalk.
- [MPC Wallet Architecture: Threshold Signing in Production](https://cheatsheets.davidveksler.com/mpc-wallet-architecture.html): Engineer and audit threshold-signing wallets: DKG, ECDSA and FROST protocol families, share topology, refresh, resharing, liveness, failure modes, and vendor diligence.
- [Post-Quantum Custody Migration: What Actually Breaks](https://cheatsheets.davidveksler.com/post-quantum-custody-migration.html): Classify quantum-exposed holdings, compare post-quantum signature sizes, understand threshold-custody barriers, track Bitcoin BIPs 360/361, and sequence migration work.
- [Stablecoin Payment Infrastructure: Issuers, Rails, Treasury](https://cheatsheets.davidveksler.com/stablecoin-payment-infrastructure.html): Engineer stablecoin payments and treasury: issuer and reserve risk, native versus bridged assets, CCTP states, finality, refunds, depeg controls, and reconciliation.
- [Wallet Recovery Forensics: Feasibility, Paths, and Search Math](https://cheatsheets.davidveksler.com/wallet-recovery-forensics.html): Triage lost crypto wallets safely: derivation-path diagnosis, BIP39 checksum search spaces, KDF cost math, recovery tools, device/media forensics, scam detection, and prevention.

## Martial Arts & Strategy

- [Ashihara Karate: Sabaki, Strikes and Kata Cheatsheet](https://cheatsheets.davidveksler.com/ashihara-karate.html): Ashihara karate reference: the sabaki circular-movement system, strikes, blocks, kicks, and all kata by belt rank, with drills and a trackable syllabus.
- [Brazilian Jiu-Jitsu: Positions, Guards & Submissions](https://cheatsheets.davidveksler.com/brazilian-jiu-jitsu.html): Comprehensive Brazilian Jiu-Jitsu cheatsheet for fundamentals, positions, guards, passes, submissions, escapes, training structure, etiquette, and progress tracking.
- [Judo Guide: Throws, Groundwork and Core Principles](https://cheatsheets.davidveksler.com/judo.html): A judo reference covering throws (Nage Waza), groundwork (Katame Waza), Kuzushi and Kumi Kata principles, Ukemi, dojo etiquette, and a trackable syllabus.
- [Martial Arts Cheatsheet: Styles, Techniques and Comparison](https://cheatsheets.davidveksler.com/martial-arts-cheatsheet.html): Comprehensive martial arts guide covering Karate, Muay Thai, BJJ, Judo, Krav Maga, Wrestling, Aikido, Kung Fu, and Boxing with origins, techniques, training methods, and expert resources.
- [The Art of War by Sun Tzu: English/Chinese Reader](https://cheatsheets.davidveksler.com/art-of-war-sun-tzu.html): Sun Tzu's The Art of War (孫子兵法) as a dual-language reader: original Chinese beside the English translation on digital bamboo slips, for students of strategy.

## Firearms & Military

- [Autonomous Defense Systems: Counter-UAS, CCA & Loitering Munitions Compared](https://cheatsheets.davidveksler.com/autonomous-defense-systems.html): Multi-vendor reference for counter-drone (C-UAS) interceptors, electronic warfare, collaborative combat aircraft, loitering munitions, EO/IR payloads, and mission-autonomy software, with verified specs and sources.
- [Future of Warfare Technology: Systems-of-Systems Dominance](https://cheatsheets.davidveksler.com/future-of-warfare-technology.html): Strategic cheatsheet on how autonomy, swarms, EW, cyber-secure compute, and directed energy will shape the next 10–30 years of warfare. Includes metrics, timelines, and countermeasures.
- [Handgun Calibers Cheatsheet: History, Ballistics & Opinion](https://cheatsheets.davidveksler.com/handgun-calibers.html): An in-depth, interactive cheatsheet comparing handgun calibers like 9mm, .45 ACP, & .357 Magnum. Explore historical context, ballistic data, and opinionated takes on their modern use.
- [Military Aphorisms: Tactical Wisdom & Maxims Cheatsheet](https://cheatsheets.davidveksler.com/military-aphorisms.html): A comprehensive collection of military aphorisms, tactical maxims, and combat laws categorized by country and service branch. Includes 'Slow is smooth', Murphy's Laws, and international wisdom.
- [Modern Firearms Cheatsheet: Pistols, Rifles & Shotguns](https://cheatsheets.davidveksler.com/modern-firearms.html): An interactive, comprehensive guide to modern firearms. Explore pistols, rifles, shotguns, and military weapons. Features a 'Firearm Finder' wizard, practical tips, and safety rules.
- [Special Forces Loadouts & EDC Gear: SWAT, Operators, Medics](https://cheatsheets.davidveksler.com/operator-loadouts.html): Real loadouts by role: SWAT entry, special forces, paramedic and EDC. Plate carriers, optics, rifles, medical kits and weights, itemised with tradeoffs.

## Radio

- [Baofeng UV-5R Guide: Ham, Emergency & GMRS Programming](https://cheatsheets.davidveksler.com/baofeng-uv5r-ham-guide.html): The definitive Baofeng UV-5R cheat sheet. Includes manual programming, ham radio protocols, disaster communication plans for Denver/Littleton, and FRS/GMRS walkie-talkie setup.
- [Baofeng UV-5R Quick Reference: Visual Guide with Definitions](https://cheatsheets.davidveksler.com/baofeng-uv5r-quick-ref.html): Beginner-friendly visual guide for the Baofeng UV-5R. Features interactive tooltips explaining radio jargon, visual key guides, screen icon definitions, and step-by-step programming.
- [EMERGENCY RADIO INSTRUCTIONS](https://cheatsheets.davidveksler.com/emergency-radio-card.html): A printable emergency radio quick-reference card: step-by-step instructions for making a MAYDAY call, checking NOAA weather alerts, and troubleshooting a handheld radio.
- [GMRS / FRS / MURS Radio Card](https://cheatsheets.davidveksler.com/gmrs-frs-murs-card.html): A field-ready US channel card with frequencies, power and bandwidth limits, repeater pairs, privacy tones, range planning, programming steps, and international equivalents.
- [Ham Radio Technician License Cheatsheet (2026-2030)](https://cheatsheets.davidveksler.com/ham-radio-technician.html): Comprehensive study guide for the FCC Technician Class Amateur Radio license (2026-2030 pool). Includes a 4-week curriculum, Ohm's law, phonetic alphabet, and key resources.

## Health & Fitness

- [Blood Test Results Explained: CBC, CMP, Lipids, A1c, Thyroid](https://cheatsheets.davidveksler.com/blood-tests-cbc-cmp-lipids-a1c-thyroid.html): Decode common blood tests without overreading a red flag: CBC, CMP, lipid panel, A1c, TSH/free T4, normal patterns, urgent cues, and questions to ask.
- [Longevity Biomarkers: Numbers That Predict Lifespan](https://cheatsheets.davidveksler.com/longevity-biomarkers.html): A practical scorecard for fitness, function, waist, blood pressure, and labs—what predicts outcomes, how to measure it, and what not to overread.
- [Longevity Supplements: Evidence, Hype & Risks](https://cheatsheets.davidveksler.com/longevity-supplements-evidence.html): A human-evidence ledger for popular longevity supplements, reported study amounts, quality concerns, interactions, and honest buy-or-skip verdicts.
- [Longevity: What Actually Works (and What Doesn't)](https://cheatsheets.davidveksler.com/longevity-what-actually-works.html): A ranked human-evidence reference for the biggest levers of healthspan and lifespan, with a leverage ladder and myth checks.
- [ER or Urgent Care? When to Go, When It Can Wait](https://cheatsheets.davidveksler.com/er-triage.html): Symptom-by-symptom decision tables built from real triage rules (Ottawa ankle, PECARN, Canadian CT Head): when chest pain, head bumps, fevers, and cuts mean 911, urgent care today, or watch at home.
- [Interactive Human Skeleton - Anatomical Study](https://cheatsheets.davidveksler.com/human-skeleton.html): An interactive 3D human skeleton viewer built with Three.js: rotate, zoom, and pan the model, then click any bone or region to see anatomical details.
- [Medical School Curriculum Cheatsheet: Comprehensive Guide](https://cheatsheets.davidveksler.com/medical-school-curriculum.html): An interactive medical school curriculum cheatsheet: basic sciences, clinical sciences, clinical skills, disease management, EBM, and healthcare systems.
- [Number Needed to Treat: What Common Treatments Actually Do](https://cheatsheets.davidveksler.com/nnt-medical-interventions.html): NNT and NNH for 30+ common interventions - statins, aspirin, SSRIs, antibiotics, mammography - sourced from Cochrane and theNNT.com, with an icon array showing your absolute odds of benefit.
- [Road Cycling Cheatsheet: Training, Pacing & Event Plan](https://cheatsheets.davidveksler.com/cycling.html): A road cycling cheatsheet for amateur riders: bike fit, power and heart-rate zones, workout types, pacing, fueling, and plans for time trials and centuries.
- [Running Cheatsheet: Training, Pacing & Race Plan](https://cheatsheets.davidveksler.com/running.html): A running cheatsheet: training principles, heart-rate zones, workout types, pacing, form, gear, fueling, injury prevention, and a race plan to marathon.
- [Sleep Optimization: The Evidence-Based Guide to Better Sleep](https://cheatsheets.davidveksler.com/sleep-optimization.html): An evidence-based sleep cheatsheet: circadian rhythm, sleep stages, an interactive improvement protocol, caffeine timing, bedroom temperature, and CBT-I.
- [Strength Training Cheatsheet: Programming & Lifts](https://cheatsheets.davidveksler.com/strength-training.html): A strength-training reference: progressive overload, rep ranges, RIR/RPE, weekly volume landmarks, big-six lift cues, program comparison, and deloads.
- [Surviving a Hospital Stay: The Family Advocate's Playbook](https://cheatsheets.davidveksler.com/hospital-stay-survival.html): What nurses tell their own families: the four medication questions, shift-change danger windows, how to call a rapid response team yourself, and the observation-status trap in Medicare coverage.
- [The Reassurance Tables: What Scary Symptoms Usually Are](https://cheatsheets.davidveksler.com/reassurance-tables.html): Palpitations, floaters, twitches, back pain, lumps, night sweats: what each usually is, with base rates, red flags, and watchful-waiting timelines that end.
- [Veterinary Diagnostics Cheatsheet: Terminology & Tests Guide](https://cheatsheets.davidveksler.com/veterinary-diagnostics.html): Your comprehensive, interactive cheatsheet for veterinary diagnostic terminology and tests. Master lab procedures, imaging, and key animal healthcare terms with our searchable guide.
- [Weight Loss & Metabolic Health Cheatsheet](https://cheatsheets.davidveksler.com/weightloss-cheatsheet.html): Interactive cheatsheet for sustainable weight loss and metabolic health. Covers consistency, nutrition, circadian rhythms, movement, stress, supplements, and more for long-term success.
- [Weight-Loss Levers: Body-Composition Control Panel](https://cheatsheets.davidveksler.com/weight-loss-levers.html): An interactive weight-loss control panel: tweak deficit, eating window, protein, sleep, and steps to see projected loss rate, split, and time to goal.

## Economics & Politics

- [The Externalized Costs of Homelessness: A Ledger](https://cheatsheets.davidveksler.com/homelessness-externalized-costs.html): Public spending, public-space exclusion, sanitation, crime, business disruption and private security, with Denver evidence, source tags and a sensitivity worksheet.

- [Capitalism: A Pro-Market Guide to Prosperity & Freedom](https://cheatsheets.davidveksler.com/capitalism.html): A pro-market guide to capitalism's core principles: how private property, free markets, and competition drive innovation, prosperity, and individual freedom.
- [Is Mississippi Richer Than the UK? US States vs Countries](https://cheatsheets.davidveksler.com/us-states-vs-countries-gdp.html): US state GDP compared with whole countries using nominal, PPP, regional prices, consumption, and household measures, including a worked Mississippi-versus-UK verdict.
- [Liberal, Libertarian, Neoliberal: Political Labels Decoded](https://cheatsheets.davidveksler.com/political-ideologies-compared.html): Classical liberal, liberal, libertarian, neoliberal, conservative, and socialist compared in one matrix, with a dated lineage map and cross-Atlantic translation guide.
- [Mercantilism vs Capitalism vs Socialism: Economic Systems](https://cheatsheets.davidveksler.com/economic-systems-compared.html): Mercantilism, capitalism, socialism, and modern hybrids side by side: ownership, prices, trade, thinkers, policies, historical cases, outcomes, and failure modes.
- [Red State vs Blue State Economies: The Actual Numbers](https://cheatsheets.davidveksler.com/red-vs-blue-state-economies.html): Red and blue states compared on GDP, income, prices, growth, jobs, migration, taxes, poverty, and federal balance, with every state and data year shown.

## Philosophy & Religion

- [Anapanasati: The 16 Steps of Mindfulness of Breathing](https://cheatsheets.davidveksler.com/anapanasati-mindfulness-of-breathing.html): An interactive guide to Ānāpānasati (mindfulness of breathing): preparation, the 16 steps across four tetrads, troubleshooting, and integration into daily life.
- [Anattā: Buddhist Not-Self Cheat Sheet](https://cheatsheets.davidveksler.com/anatta-not-self.html): A practical, source-grounded cheat sheet to anattā: Buddhist not-self, five aggregates, self-view traps, inquiry protocols, and common misunderstandings.
- [Anger: The Buddhist / Cognitive Debugging Guide](https://cheatsheets.davidveksler.com/anger-buddhist-cognitive-debugging.html): A secular, practical cheatsheet for debugging anger with Buddhist training and cognitive tools: body signals, threat stories, speech gates, repair, and long-term practice.
- [Buddhism Cheatsheet: Core Teachings & Practice Map](https://cheatsheets.davidveksler.com/buddhism.html): A comprehensive, secular-friendly Buddhism cheatsheet covering the Four Noble Truths, Eightfold Path, meditation, ethics, not-self, karma, traditions, and common misconceptions.
- [Buddhist Practice for Work & Leadership Cheatsheet](https://cheatsheets.davidveksler.com/buddhist-work-leadership.html): A secular, practical cheatsheet translating Buddhist training into leadership habits: attention, speech, conflict, power, systems, decisions, and repair.
- [Buddhist Wisdom Cheatsheet: Key Principles & Practices](https://cheatsheets.davidveksler.com/buddhism-core-principles.html): An interactive guide to core Buddhist principles: the Four Noble Truths, Eightfold Path, and meditation, with a Pāli toggle and actionable practice pointers.
- [Craving, Desire, and Habit Loops: A Secular Debugger](https://cheatsheets.davidveksler.com/craving-desire-habit-loops.html): A secular, practice-first cheatsheet for distinguishing healthy desire from craving, mapping habit loops, and interrupting compulsive wanting without becoming passive.
- [Etz Chaim Cheatsheet: Tree of Life and the Sefirot](https://cheatsheets.davidveksler.com/etz-chaim-tree-of-life.html): An interactive visual cheatsheet exploring the Etz Chaim (Tree of Life) and its Sefirot. Delve into Kabbalistic concepts, their meanings, and their echoes in traditional Jewish thought.
- [Four Ways of Leading & Being: Conscious Leadership Contexts](https://cheatsheets.davidveksler.com/conscious-leadership-contexts.html): A summary table of the Four Contexts for Experiencing the World (To Me, By Me, Through Me, As Me) from The 15 Commitments of Conscious Leadership, with explanatory tooltips.
- [History of Israel: Timeline & Primary Sources](https://cheatsheets.davidveksler.com/israel-history.html): A comprehensive interactive timeline of the history of Israel from ancient biblical times to the modern state, featuring links to original treaties, UN documents, and primary sources.
- [Islam Cheatsheet: Core Beliefs, Practices & Texts](https://cheatsheets.davidveksler.com/islam.html): Islam cheatsheet: Explore core beliefs (Iman), Five Pillars, Quran, Hadith, Sharia, holy days, lifecycle rituals, and major branches (Sunni, Shia, Sufism). Interactive with Arabic toggle.
- [Judaism: Core Beliefs, Practices & Texts](https://cheatsheets.davidveksler.com/judaism.html): Judaism cheatsheet: Explore core beliefs, practices, texts (Torah, Talmud), 613 mitzvot, holidays, history & movements. Interactive with Hebrew toggle.
- [Objectivism: The Philosophy of Ayn Rand - A Cheatsheet](https://cheatsheets.davidveksler.com/objectivism.html): A concise cheatsheet on Objectivism's core principles — Metaphysics, Epistemology, Ethics, Politics, and Aesthetics — from Ayn Rand's philosophy, with quotes.
- [Right Speech for Modern Life: A Communication Debugger](https://cheatsheets.davidveksler.com/right-speech-modern-life.html): A practical, secular cheatsheet for truthful, useful, timely, and humane communication across work, family, social media, conflict, feedback, and repair.
- [Satipaṭṭhāna: Four Foundations of Mindfulness Cheat Sheet](https://cheatsheets.davidveksler.com/satipatthana-four-foundations.html): A source-grounded, practical cheat sheet to Satipatthana: the four foundations of body, feelings, mind, and dhammas, with practice protocols and mistakes.
- [Shabbat Evening Service: Kabbalat Shabbat & Ma'ariv](https://cheatsheets.davidveksler.com/shabbat-services-cheatsheet.html): Interactive guide to Shabbat evening services: Kabbalat Shabbat, Ma'ariv, key prayers, Hebrew names, themes, and Reform, Conservative, Orthodox flows.
- [The 15 Commitments of Conscious Leadership](https://cheatsheets.davidveksler.com/leadership.html): An interactive cheatsheet on The 15 Commitments of Conscious Leadership by Dethmer, Chapman & Klemp: leading 'above the line' with expandable sections.
- [The Five Hindrances: A Debugger for Mental States](https://cheatsheets.davidveksler.com/five-hindrances-debugger.html): A secular, practice-first cheatsheet for diagnosing and working with the five Buddhist hindrances: desire, aversion, dullness, restlessness, and doubt.

## Engineering & Science

- [AI Accelerator Comparison: NVIDIA, AMD, Google & AWS Silicon](https://cheatsheets.davidveksler.com/ai-accelerator-comparison.html): NVIDIA, AMD, Google TPU and AWS Trainium compared by dense compute, HBM, bandwidth, interconnect, power, and access — with transparent efficiency math.
- [AI Data Centers: Chips, Power, Cooling & Scale](https://cheatsheets.davidveksler.com/ai-datacenter-infrastructure.html): A hub for how AI data centers work layer by layer — chips and accelerators, the grid-to-GPU power chain, cooling limits, the numbers that matter, and community impact.
- [AI Infrastructure Numbers Everyone Should Know (2026)](https://cheatsheets.davidveksler.com/ai-infrastructure-numbers.html): The order-of-magnitude numbers for AI data centers: kW per rack, watts per GPU, PUE and WUE bands, MW per 10K GPUs, capex per megawatt, and time to power.
- [Automotive Innovation Timeline: From Model T to Tesla](https://cheatsheets.davidveksler.com/automotive-innovation-timeline.html): An interactive timeline of automotive innovation from the Ford Model T's flywheel magneto (1908) to Tesla's Full Self-Driving AI, covering key breakthroughs.
- [Boom Supersonic Overture: Specs, Range, Speed & Timeline](https://cheatsheets.davidveksler.com/boom-supersonic.html): Boom Supersonic Overture specs: Mach 1.7 cruise, 4,250 nm range, 64-80 premium seats, Symphony engine, XB-1 demonstrator, and the timeline to 2028 first flight and 2029 service entry.
- [Data Center Coming to Your Town? Every Claim Graded by Evidence](https://cheatsheets.davidveksler.com/data-center-community-impact.html): Do data centers raise electric bills? How many jobs do they create? Booster and opponent claims graded against published evidence, with sources.
- [Data Center Cooling Thresholds: When Air Stops Working](https://cheatsheets.davidveksler.com/datacenter-cooling-thresholds.html): At what rack density does air cooling fail? A vendor-neutral decision ladder from CRAC to two-phase direct-to-chip, with reconciled kW/rack thresholds.
- [Deaths per Terawatt-Hour: Every Energy Source, Ranked](https://cheatsheets.davidveksler.com/deaths-per-terawatt-hour.html): Coal, oil, gas, hydro, wind, solar, nuclear: mortality per unit of energy, why the ranking inverts intuition, and the honest accounting of Chernobyl, Fukushima, and Banqiao.
- [Engineering Materials: Graphene, Metamaterials & Composites](https://cheatsheets.davidveksler.com/engineering-materials-future.html): A next-generation materials guide to graphene, metamaterials, and advanced composites: extreme properties, physical limits, and near-term R&D playbooks.
- [Engineering Metals & Alloys: Properties & Equivalents](https://cheatsheets.davidveksler.com/engineering-metals-selection.html): An engineering metals guide comparing steel, aluminum, titanium, copper and more: mechanical properties, common equivalents, and selection terminology.
- [Geoengineering Comparison: Climate Intervention Approaches](https://cheatsheets.davidveksler.com/geoengineering-approaches.html): Cost-effectiveness of geoengineering: Direct Air Capture, Enhanced Rock Weathering, BECCS, Stratospheric Aerosol Injection, and Marine Cloud Brightening.
- [Human Evolution: An Interactive Journey Through Time](https://cheatsheets.davidveksler.com/human-evolution.html): An interactive journey through millions of years of human evolution: ancient hominid species, migration tracked on a dynamic map, and key fossil sites.
- [Humanoid Robots 2026: Every Company, Robot and Spec Compared](https://cheatsheets.davidveksler.com/humanoid-robots.html): Optimus, Figure 03, Atlas, Digit, Unitree and more: height, payload, battery, actuators, price and ship date for every humanoid robot program, updated 2026.
- [Nuclear Reactor Types: PWR, BWR, CANDU, SMR, Molten Salt](https://cheatsheets.davidveksler.com/nuclear-power-reactor-types.html): Compare nuclear reactor types by coolant, moderator, fuel, pressure, safety behavior, maturity, waste output, deployment status, and real-world examples.
- [Orbital Rocket Comparison & Spaceflight Cheat Sheet](https://cheatsheets.davidveksler.com/rockets-and-spaceflight.html): Compare orbital rockets by payload, thrust and reuse, then follow the spaceflight stack from launch to satellites, habitats and deep space. A curated hub of spaceflight cheat sheets.
- [Rocket Size Comparison: Starship, New Glenn, Falcon Heavy](https://cheatsheets.davidveksler.com/orbital-rockets-comparison.html): Compare Starship, New Glenn, Falcon Heavy, Falcon 9, Ariane 6, Vulcan and Long March 5 side by side: payload to LEO, height, thrust, reuse, cost and status.
- [Semiconductor Manufacturing: Wafer to Chip Process Guide](https://cheatsheets.davidveksler.com/semiconductor-manufacturing.html): Understand semiconductor manufacturing from wafer growth to lithography, deposition, etch, doping, CMP, metrology, yield, packaging, EUV, nodes, and fab economics.
- [Sensors: Cameras, LiDAR, Radar, IMU, GPS, and Sensor Fusion](https://cheatsheets.davidveksler.com/sensors-cameras-lidar-radar-imu-gps.html): Compare cameras, LiDAR, radar, IMU, GNSS, ultrasonic, and thermal sensors: what each measures, how they fail, when to fuse them, and which stack fits robots, cars, drones, and AR.
- [Space Habitats and Life Support: Air, Water & Heat](https://cheatsheets.davidveksler.com/space-habitats-life-support.html): A systems guide to space habitats: atmosphere, CO2 removal, water recycling, thermal control, radiation shielding, waste, food, maintenance, and the tradeoffs that keep crews alive.
- [Stellar Lifecycle: A Scroll-Driven CSS Animation Journey](https://cheatsheets.davidveksler.com/stellar-lifecycle.html): An animated, scroll-driven journey through a star's full life: molecular cloud, protostar, main sequence, red giant, and the final fork into a black hole.
- [Stop Calling Them AI Data Centers: A Field Guide](https://cheatsheets.davidveksler.com/data-center-myths.html): AI is only about a quarter of what data centers run — the rest is the plumbing of modern civilization. A fact-checked reference on data centers and electricity.
- [The Data Center Power Chain: Grid to GPU, How AI Gets Power](https://cheatsheets.davidveksler.com/datacenter-power-chain.html): How power reaches an AI data center: interconnection queues, substations, switchgear, UPS, busways, and rack PDUs, plus behind-the-meter gas turbines and SMRs.
- [Tesla Products & Specs: Every Model, Battery and Platform](https://cheatsheets.davidveksler.com/tesla-products.html): Full Tesla lineup specs: Model 3, Y, S, X, Cybertruck, Semi, Roadster and Optimus. Battery chemistry, range, drivetrain, platform and pricing in one table.

## Home & Lifestyle

- [A Cheatsheet to Global Cuisines: Ingredients & History](https://cheatsheets.davidveksler.com/global_cuisine_guide.html): Your ultimate cheatsheet to global cuisines. Explore the key ingredients, techniques, and history of Italian, Mexican, Chinese, and more iconic food traditions.
- [Air Purifiers & Water Filters: What Works, What's Marketing](https://cheatsheets.davidveksler.com/air-water-filtration.html): CADR math, CR-box build specs, NSF certification decoding, why TDS meters mislead, and how to test water before buying. The no-affiliate spec-sheet guide.
- [Amish Technology: How They Actually Decide What to Adopt](https://cheatsheets.davidveksler.com/amish-technology-decisions.html): The Amish do not reject technology — they filter it: community trials, reversibility, phone shanties, and eight questions for your own next adoption decision.
- [Baby Gear: What You Actually Need (and the Fear-Priced Rest)](https://cheatsheets.davidveksler.com/baby-gear-audit.html): The short list a baby actually requires, the bestsellers that are theater or hazards, container-baby syndrome, babywearing safety, and honest sleep evidence.
- [Command Deck: A Daily One-Page Cockpit for Your Open Loops](https://cheatsheets.davidveksler.com/command-deck.html): A personalizable daily cockpit: track parallel life campaigns, count down hard deadlines, propose your highest-leverage Daily 3, and log calibrated decisions.
- [Home Electrical Basics: Breakers, GFCI, AFCI & Safety](https://cheatsheets.davidveksler.com/home-electrical-basics.html): Understand breakers, GFCI/AFCI protection, circuits, amps, watts, panels, extension cords, appliance loads, and the safety lines where homeowners should stop.
- [Home Maintenance Guide: Seasonal Checklists & Tips](https://cheatsheets.davidveksler.com/home-maintenance-guide.html): Seasonal home maintenance checklists and expert tips: routine tasks, emergency prep, and interactive tools to keep your home in top condition year-round.
- [Hot Tub Water Chemistry: Sanitizers & Pseudomonas](https://cheatsheets.davidveksler.com/hot-tub-treatment.html): Practical hot tub maintenance reference: target chemistry ranges, interactive dosing calculator, biofilm purge protocol, Pseudomonas folliculitis treatment, and sanitizer strategy decisions.
- [Lawn Irrigation Math: How Long to Water Each Zone](https://cheatsheets.davidveksler.com/lawn-irrigation-watering-math.html): Turn lawn watering advice into minutes per zone: precipitation rate, catch-cup tests, ET, soil type, slope, cycle-and-soak, sprinkler audits, and water-use math.
- [Pro Cooking: Interactive Culinary Cheatsheet](https://cheatsheets.davidveksler.com/cooking-guide.html): Stop kitchen fails! Our interactive culinary cheatsheet makes you a cooking master. Learn pro techniques, tips & drills. Go from beginner to kitchen hero & impress everyone! 🚀
- [Samsung Bespoke Wall Oven (NQ70CB700D12AA) Master Guide](https://cheatsheets.davidveksler.com/samsung-bespoke-oven-guide.html): Interactive, manual-based cheat sheet for the Samsung Bespoke NQ70CB700D12AA combo wall oven with microwave, steam, air fry, Flex Duo, cleaning steps, and error codes.
- [The Glue Chart: Which Adhesive for Which Two Materials](https://cheatsheets.davidveksler.com/the-glue-chart.html): A materials-by-materials adhesive matrix — wood, metal, plastics by type, glass, ceramic, rubber, fabric, and stone — plus surface prep and cure times.
- [The Household Numbers: Right Settings, Not Factory Defaults](https://cheatsheets.davidveksler.com/the-household-numbers.html): Water heater temp, fridge and freezer setpoints, humidity bands, tire PSI, HVAC filters, dishwasher settings, and every household number with evidence.
- [Wealthy Demeanor: 10 Blueprints to Living Richer](https://cheatsheets.davidveksler.com/living-richly-guide.html): Discover 10 practical blueprints to cultivate a wealthy demeanor and mindset, even without a large bank account. Actionable tips for a richer life, focusing on habits, perspective, and smart choices.

## Life Admin & Consumer Defense

- [Auto Repair Upsells Decoded: What Your Car Actually Needs](https://cheatsheets.davidveksler.com/auto-repair-decoder.html): Dealer service-menu upsells graded against the owner's manual, plus noise diagnosis, warranty rights, OBD-II triage, and repair-vs-replace math for old cars.
- [Debt Collector Calling? Rights, Scripts, 30-Day Letter](https://cheatsheets.davidveksler.com/debt-collection-defense.html): The 30-day debt validation demand, statute-of-limitations shield, re-aging traps, illegal collector scripts, settlement rules, and credit-report cleanup steps.
- [Estate Documents: Will vs. Trust and Beneficiaries](https://cheatsheets.davidveksler.com/estate-documents.html): Will vs. living trust vs. beneficiary designations: which documents your situation actually needs, honest DIY-vs-lawyer boundaries, and the failure modes that sink even professional plans.
- [Flight Cancelled? What To Do: Refunds Not Vouchers, EU261](https://cheatsheets.davidveksler.com/flight-disruption-playbook.html): Flight cancelled or delayed? The parallel-rebooking drill for the first 15 minutes, your DOT cash refund rights, EU261 compensation, and boarding rules.
- [Freelance Contract Red Flags: Clause Guide & AI Rubric](https://cheatsheets.davidveksler.com/contract-red-flags.html): The 12 clauses that burn freelancers - IP assignment, indemnification, liability caps, Net-90 - with copy-paste counter-language and an AI rubric that turns any model into your contract reviewer.
- [Hiring Your First Employee: The Complete Agency Checklist](https://cheatsheets.davidveksler.com/first-employee-checklist.html): EIN, I-9, W-4, state withholding, unemployment insurance, workers' comp, new-hire reporting, payroll deposits - every registration and deadline for your first hire, in order.
- [How to Hire a Contractor Without Getting Burned](https://cheatsheets.davidveksler.com/hiring-a-contractor.html): Deposit caps by state, milestone payment schedules that keep money behind the work, sub-and-supplier reference calls, lien waivers, and the escalation ladder for when it goes wrong anyway.
- [IRS Audit Odds: Triggers & Deductions You're Skipping](https://cheatsheets.davidveksler.com/audit-odds.html): Audit rates by income from real IRS data, what actually triggers audits, the deductions fear makes people skip, and what to do when a CP2000 letter arrives.
- [Protect Parents from Scams: Scripts, Code Word, Recovery](https://cheatsheets.davidveksler.com/scam-defense-for-parents.html): Every major scam targeting older adults: the scripts, payment tells, family code word, hardening checklist, and fast no-shame recovery steps after a loss.
- [Small Business Scams: The Letters, Calls, and Fake Invoices](https://cheatsheets.davidveksler.com/small-business-scams.html): Certificate of existence letters, annual report filing services, poster invoices, fake USPTO renewals, ADA letters, toner scams, and the 60-second test.
- [Small Claims Court: How to Sue, Defend, and Actually Collect](https://cheatsheets.davidveksler.com/small-claims-court.html): Demand letter template, the arbitration loophole for suing corporations, 50-state claim limits, a defense playbook, and the collections toolkit filing guides skip.
- [The Free Version Exists: 53 Paid Services You Can Get for $0](https://cheatsheets.davidveksler.com/the-free-version-exists.html): Credit monitoring, tax filing, unclaimed money finders, notaries, EIN filing, DMV sites, warranty extensions: 53 paid services with free official equivalents.
- [What Insurance Is Worth It: BUY / SKIP / TRAP Verdicts](https://cheatsheets.davidveksler.com/insurance-worth-it.html): Every common insurance product stamped BUY, SKIP, or TRAP, with loading factors showing what you get back per premium dollar, coverage-sizing math, and the commissions behind the whole-life pitch.
- [What to Do When Someone Dies: The First 72 Hours Checklist](https://cheatsheets.davidveksler.com/death-logistics.html): A calm, hour-by-hour checklist for the first 72 hours after a death, plus your FTC Funeral Rule rights, real cremation and burial prices, and exact words to refuse funeral-home upsells.
- [Why Glasses Cost $400 — and How to Pay $40 (PD, Rx, Online)](https://cheatsheets.davidveksler.com/eyeglasses-decoded.html): One company owns the lens brands, frame brands, retail chains, and the insurance plan. How to read your Rx, measure your PD, know when online works — and when the optician earns it.