Thanks to Skuds I am now aware of the existence of Acronym Finder. Just like in Blackadder III when Prince George used Dr Johnson's dictionary to look up rude words, I could find one significant use for this site, namely:-
Travelling Wave Amplifuer Tube
Tactical Optical Surveillance System
and so on...
It even lists the Committee for the Liberation and Integration of Terrifying Organisms and their Rehabilitation Into Society (OK that one is from Red Dwart. I watch too much telly!)