Includes lectures on the history of Berkeley Unix given between 1999 and 2016. The first lecture is "Twenty years of Berkeley Unix: from AT&T-owned to freely redistributable" and was given in 1999. The second lecture is "Building and running an open-source community: the FreeBSD project" and was given in 2006, 2011, and 2016. Also includes slides and notes for the 2016 lecture.
