The FreeBSD project keeps the entire operating system sources in a single master source
tree, called a repository, which is maintained by the Concurrent Versions System, or CVS.
It’s included in most multi–CD-ROM distributions of FreeBSD. The repository contains
all versions of FreeBSD back to Release 2.0 and the last release from the Computer
Sciences Research Group of the University of California at Berkeley, 4.4BSD-Lite, upon
which it was based. For copyright reasons FreeBSD Release 1 was not included, because
at the time, as the result of the lawsuits described on page 8, it was not permitted to
distribute it freely. That situation changed in early 2002,...