I'd like to officially change my answers as follows:
1.) Société Anonyme Belge d'Exploitation de la Navigation Aérienne (SABENA).
2.) It was called SCADTA (Sociedad Colombo-Alamana de Transportes Aereos).
3.) Saudi Arabian Airlines Corporation (Later known as 'Saudia' and, in the present, 'Saudi Arabian')
4.) American, Braniff, Mohawk, Allegheny, Florida Express, Pacific Express, Cascade, USAir.
5.) DAN stood for "Davies And Newman", two British shipbrokers.
6.) Midwest Express
7.) Mexicana, Aviacsa.
8.) False. TAA became Australia Airlines before QANTAS took them over.
9.) Swissair, American and USAir
10.) Indian Airlines