Late yesterday I read Knuth’s “The Errors of TEX” which details his debugging efforts with TEX from 1978 until 1989. Aside from an interesting commentary on the more interesting bugs there is also his complete error log (i.e. a ChangeLog). I only skimmed the fifty odd pages of the log itself, but at the top of the entry for 14 March 1978 I spotted:
Came in evening after sleeping most of the day, to get computer at better time.
Some day we will have personal computers and will live more normally.
I don’t think there is an electronic version of this paper, it’s from Software – Practice and Experience, Vol 19, p697-685 (1989). The electronic archives only seem top go back to 1995. You can get a PDF of the error log at http://www.loria.fr/services/tex/historique/errorlog.pdf.