1978^ - Return of the ^ to denote when the airline was formed. This is in lieu of an operating start date and will be replaced when operating dates confirmed(slowly being replaced by the comment field)
2006* - The asterisk denotes that the start and/or end date are earliest/latest proven dates
Ada Air* - Asterisk on the airline denotes not totally sure of the airline's country
Inactive - Ceased operating or suspended
Unconfirmed - Companies that have not been confirmed as actual airlines
> - renamed to....
>> - merged into or absorbed by....
+> - Assets taken over by airline
Began? - The airline may not have started or even been renamed before commencement of operations. So called "Paper Airlines"