Aerophilately – A combination of aero (air) and philately (the hobby of stamp collection) gives us aerophilately, the popular area of collecting devoted to air mail. Aerophilately is the hobby of collecting air mail stamps, and envelopes (covers) that have been sent by air mail — including by airplane, balloon or other types of aircraft. Many consider airmail a snapshot of the development of aviation and its effect on world communications as new routes opened the doors between people, nations, and continents.
 
Air Mail Etiquettes – Etiquettes are labels and stickers that are affixed to covers to denote a special type of service such as registration, certified, etc. Air mail etiquettes, denoting non-ground transport, they may be created by a government or a private firm. Air labels are similar to etiquettes. They are issued by airlines as a way to advertise their name and identify airmail letters. The definitive guide is the eight-volume Airtransport Label Catalogue, published by the Aeronautica and Air Label Collectors Club.