[Starwatcher2001]

My worst hack was a bug in a small network I wrote to interface to some barcode readers and displays. There was a buffer overflow in the interrupt routine of my 8088 assembler code, which would occasionally miss an outgoing character.

The prompt should have read "Please scan card count", but unfortunately it missed the "o" out of the last word...

[dave333]

We had a similar but not quite as funny occurrence when our teletype would sometimes flip a bit. When users logged into our system via the Asynchronous Multi Line Controller we got a console message AMLC IN USE however the last char was changed to A. Made us giggle since we were in Auckland NZ at the time.