The original sources of MS-DOS 1.25, 2.0, and 4.0 for reference purposes

Collection of malware source code for a variety of platforms in an array of different programming languages.

BareMetal is a 64-bit OS for x86-64 based computers. The OS is written entirely in Assembly while applications can be written in Assembly, C/C++, and Rust.

Mirror for MikeOS 4.5 - Simple and educational Operating System written by Mike Saunders