Well, I'll just copy/paste a part of the interview that Greg Easter (Atari VCS Snow White) gave to me for my book:

"...The only other programmer who was turning out games quickly was Howard Warshaw, but he had produced the greatest losses for the company ever in 2600 sales. His games had bugs and problems with the quirky designs that left most players bewildered as to what they were even supposed to be doing to play it. One of his games flashed his initials on the screen in gigantic letters when a certain sequence of commands was carried out - which ironically I was the first person to invent. This is called an "Easter Egg" in the business, and was named after me by Mike Lipschutz, who was my boss back in 1978. I had done the same thing to programs that I wrote then so that I would have proof that I was the programmer for use in future job interviews. Only I made sure that the commands issued to bring up my name were completely impossible to do accidentally... "

That's my version.

Man, I need to finish that book...page 372 reached.