From "Radio Acronyms 4000+ (Always under construction) By Hugh Stegman ..."
http://www.ominous-valve.com/acronyms.txt:

CAT (1)Clear Air Turbulence
CAT (2)Computer Aided Transceiver, proprietary control interface

From "Telecommunication abbreviations English Russian dictionary for
Polyglossum" http://www.ets.ru/e/ei000056.htm

CAT, computer aided transceiver ?????????????????? ????????????????
~, channel activity table ??????? ?????????? ???????

See also http://en.wikipedia.org/wiki/CAT

And I just added it to http://en.wiktionary.org/wiki/CAT#.7B.7Bacronym.7D.7D

Tom