I can trump that !
This one has to be anon.
About twenty-five years ago, I was working for a large bank on their market data systems. The vast majority of the Reuters market data was page based, each page being 17 rows x 64 columns of data. However Reuters had just released a new set of page data (in beta) which was 25x80.
I typed in the new page name (I think it was BP.L or something like that) and lo and behold, up came a new page, 25x80, with lots of useful data. I showed this to a friend of mine (really, it was a friend of mine), who said "I've got a mate at XXX bank which runs YYY system (different to ours) - I'll tell him about it"
So he rang him up, and this is what I heard.
"Have you seen these new large pages from Reuters?"
"Well, try typing in BP.L"
"Ah. Well, I'd better let you go then."
He put down with the phone, turned to me with a grin and said "We've just brought down the whole trading floor at XXX bank."