1) Air Traffic Control 2) Air Transport Command 3) FAA airport serv 4) FAA airport service 5) FAA employee 6) Federal aviation service gp 7) JFK tower grp 8) LAX tower gp 9) Lax tower service 10) ORD tower gp 11) PDX tower group 12) Pilot-guiding svc Found on https://www.crosswordclues.com/clue/atc
Advanced Technical Civilization. A civilization capable of communicating across the galaxy or even greater feats of technology. Found on http://www.coseti.org/glossary.htm
Automatically controls a vehicle's heating and cooling systems, maintaining a temperature preset by the occupant. Found on https://www.encyclo.co.uk/local/22335