Oh dear Melchie....
.....TTN has been out for a while, as have I. These may well be common abbvs. these days but if someone makes an effort to keep in touch with the organisation they spent a large part of their lives working in, don't crap on them with the smart arse answers.
The response to the OP was also pretty ****ty. I think he's probably thinking twice about following through on his original idea.
Oh, and spare me the "it's only a bit of banter" IYCTAJYSHJ sort of reply.
The Ancient Mariner