2) Life after WWII: any WWII aircraft type re purposed after WWII. F4U, A-26, C-47 and Bf109 just to name a few were used for decades after the war. Buffalo Air Lines still operate a C-46 up in Canada. The build would include both military and civilian use. From air racers to transport converted bombers.
3) Jets 1st generation. Runs through the Korean era gun armed jets MiG F-84,86 Hunter, Meteor and so forth.