On: The Errors of TeX [pdf] (1989)

[bombcar]

Ok. Knuth makes mistakes, nice to know. Let's read about them. Oh, he categorizes them nicely.

WAIT A MINUTE HE HAS A LIST OF CATEGORIES FROM A-T THAT ARE NAMED TO COINCIDE WITH THE LETTER!

And they alliterate!

[taeric → bombcar]

Knuth is delightfully fun in pretty much all he does. Read his manuals for TeX, where he has exercises. And consider his versioning schemes.