Reference Index
Every QuickRef set in one place. Each entry pairs a working tool with a concise, citable explainer drawn from the primary standard.
All references
15 setsNATO Phonetic Alphabet
The 26 code words (Alfa, Bravo, Charlie) that spell letters unambiguously over radio and phone.
Read reference →02Morse Code
A timing based code of dots and dashes that encodes letters, digits, and punctuation.
Read reference →03ASCII Table
The 128 character encoding that maps numbers 0 to 127 to letters, digits, symbols, and control codes.
Read reference →04HTTP Status Codes
Three digit codes grouped 1xx to 5xx that describe the result of an HTTP request.
Read reference →05HTML Entities
Named and numeric escapes such as < and © that render reserved or special characters.
Read reference →06Keyboard Shortcuts
Cheat sheets of the key combinations for the editors and tools developers use daily.
Read reference →07Greek Alphabet
The 24 letters of the Greek alphabet with their names, uppercase and lowercase forms, and common uses.
Read reference →08Braille Alphabet
The six dot Braille cell and the dot patterns for the letters A to Z in Grade 1 Braille.
Read reference →09Flag Semaphore
The two flag positions, described as clock hands, that signal each letter of the alphabet at a distance.
Read reference →10Resistor Color Codes
The color bands that encode a resistor's value: digit colors, multipliers, and tolerance.
Read reference →11Currency Symbols
Common currency symbols with their ISO 4217 code, the currency name, and the Unicode code point.
Read reference →12Git Cheat Sheet
The everyday Git commands for staging, committing, branching, and syncing with a remote.
Read reference →13Markdown Cheat Sheet
The core Markdown syntax for headings, emphasis, lists, links, images, and code.
Read reference →14Regex Cheat Sheet
The regular expression metacharacters, quantifiers, character classes, and anchors you reach for most.
Read reference →15Roman Numerals
The seven Roman numeral symbols, the subtractive pairs, and the values you meet on clocks, chapters, and dates.
Read reference →Reference pages built to be cited
A reference page earns its keep when other writers link to it. That only happens if the page is accurate, stable, and pleasant to read, so each entry here is compiled from the primary standard, checked cell by cell, and given a plain explanation of where it comes from and how to use it. The tables live at fixed URLs, which means a wiki, a document, or a blog post can point to the exact section it needs.
Start with the NATO phonetic alphabet, decode a signal with the Morse translator, or look up a response with the HTTP status codes. Every set is free, runs in your browser, and sends nothing anywhere.