Original Apollo 11 Guidance Computer (AGC) source code for the command and lunar modules.

Hello world in every computer language. Thanks to everyone who contributes to this, make sure to see contributing.md for contribution instructions!

File formats dissections and more...

mal - Make a Lisp

the official Rust and C implementations of the BLAKE3 cryptographic hash function

Web server for Linux written in amd64 assembly.

Mirror of JONESFORTH

Official repository for 8086tiny: a tiny PC emulator/virtual machine

A set of minimal dependency bootstrap binaries

Architectural privilege escalation on x86

Tetris that fits into the boot sector.

Arithmetic calculator in x86 assembly

A Lisp interpreter for Raspberry Pi implemented in a single ARM assembly file

The best C-like language that can be implemented in 10kLOC.

The dissection of a simple "hello world" ELF binary.

PC-MOS/386 v5.01 and up, including cdrom driver sources.

Commodore 64 BASIC and KERNAL Source

The Kestrel is a family of home-made computers, built as much as possible on open-source technology, and supporting as much as possible the open-source philosophy.

A Forth implementation for the TI-84+ calculator.

Source for OUP/M - a CP/M-like operating system for 6502