Double-O 120...

MOCs are no more. MOS IDs, Military Occupation Structure Identification codes, are the new designators in town, and the Formerly Frozen Chosen, until recently known as 291ers in reference to the 291 Communicator Research trade, are now members of the 00120 trade.

Like the commentator on the Online Oldtimers page, I just can't see "the 00120ers" ever catching on as a nickname, though...