Continuous Unix commit history from 1970 until today

The history and evolution of the Unix operating system is made available as a revision management repository, covering the period from its inception in 1970 as a 2.5 thousand line kernel and 26 commands, to 2017 as a widely-used 27 million line system. It has been created by synthesizing with custom software 24 snapshots of systems developed at Bell Labs, the University of California at Berkeley, and the 386BSD team, two legacy repositories, and the modern repository of the open source FreeBSD system. The repository contains:

The files appear to be added in the repository in chronological order according to their modification time, and large parts of the source code have been attributed to their actual authors.

Source: github.com