Why does 'tac' mean "reverse abcd to dcba, line-by-line, on the input stream? Human brevity and wit. and then look at the Bloomberg Terminal and ask "Why does 'OTFN'* mean "empty oil tanks departing ports with a cost modifier proportional to the time left in port and risk of loading delays vs. departure cutoffs?", it's for the same human reasons: someone wanted to type as few letters as possible to get something done, and came up with something that seemed good at the time, and it stuck.
Hacking shows always show us people typing three commands and ending up at the [fictional agency of choice] here. Bloomberg can work magic beyond belief with three commands, and even more amazingly dedicated the HELP button on every keyboard to "press it repeatedly and HELP opens the chat to you", which is maybe the best approach I've ever seen.
* OTFN "Oil The Fuck Now" may or may not exist in Bloomberg Terminal, I sadly do not have access :(
That's not sold
No, given freely away for "protection".
Evil mode off:
I have less problems with western TLAs as they exist today but find it very scary to think about what might happen once we see a really big data leak from FB. Or Facebook folds and is bought by someone who's set on making money from the assets.
I didn't know about the "Bloomberg Terminal" before, but now that makes a lot more sense where that idea comes from.