Here you can find a list of historic repositories in github. From Linux to the Original Apollo 11 Guidance Computer (AGC) source code.
---
chrislgarry/Apollo-11:
name: Apollo 11
description: Original Apollo 11 Guidance Computer (AGC) source code
year: 1969
repo: https://github.com/chrislgarry/Apollo-11
website: http://www.ibiblio.org/apollo/
torvalds/linux:
name: Linux kernel source tree
description: The Linux kernel is an open-source monolithic Unix-like computer operating system kernel. The Linux family of operating systems is based on this kernel, Android OS as well.
year: 1991
repo: https://github.com/torvalds/linux
website: https://www.kernel.org/doc/html/latest/
---