2A is the DeHavilland Comet - the first jet airliner which ended production after it was determined that a number of inflight breakups were caused by fatigue cracks that started at the corners of it's rectangular cabin windows.
2B is Air Force 1 (can't miss that paint scheme), but AF1 before the 747's replaced it - it's a B707 although being operated by the Air Force it may have a military designation also.
3A is the Boeing 247 - it has military markings so the military may have had a different designation for it
3B is the Douglas DC-3 (military designation C-47) which ironically came into being because Boeing refused to sell it's 247's to TWA