Re: Not really concealing anything, more like technically accurate shorthand.
Try working for IBM. I spent 13 years there and I couldn't make sense of all the three letter acronyms they had for procedures, departments, positions... "Yeah, I know you were a SIL, but from now on, you're a SAM"* was the bread and butter...
*That kind of announcement was always counterattacked with "Will I get a pay raise?", even knowing the inevitable answer would be "Nope, just a raise in your responsibilities".