[dalke]

I found an error in a published version of TAOCP, 2nd edition I think, with improvements on Sieve of Eratosthenes. I was so excited, then found it was already listed in the errata.

I later got a check for identifying a minor issue with the early history of superimposed coding. I happen to have copies of the relevant patent case containing examples predating Mooers' randomized superimposed coding.

("Happened to" because I had visited the Mooers archive at the Charles Babbage Institute in Minnesota to research some of the early history of chemical information management. Mooers is one of the "fathers" of information retrieval, and in fact coined the term "information retrieval" at a chemistry conference.)