Back in the olden days of the 8086, I heard the story of the “bug” on the tube being the derivation of “bug” in geekese. Said now to be a Nerdurban myth.
I also heard about how some guy was using a program, put out by IBM IIRC. He hit a key combination he didn’t ordinarily do, and all his stuff went straight into the bit bucket, poof, hours of work went to the place that the candle flame goes when you blow it out.
He called up the malefactors and screamed his head off and the told him “Thats not a bug. That’s a feature, press that combination of keys to delete everything. It just wasn’t documented.” According to the Nerdurban legend, the next printed documentation did indeed list that key combination as a “feature”! “Chutzpah”, as they say in Lubbock!