No, I think the "A" denotes the first generation of the aircraft.
Oh, right, right now it's the F-22A, but you had said it was the F-22/A, so I thought either the "/A" was misplaced, or it was to denote something different. But if you just mistyped it, I can see what you're saying. The last letter identifies different varients of aircraft (e.g. F-16A, F-16B, F-16C, F-16D, F-16XL, etc...), not necessarily generation. Upgrades are denoted denoted differently for many aircraft, for F-16s, it's the various Blocks of F-16s that are manufactured (e.g. Block 50/52/etc...) and somthing else for F-15s (for the life of me I can't remember right now). Generations are much more broad groups of fighters. Current fighters now are 4th generation fighters (like the F-14, F-15, F-16, or F-18 ), or fighters in service from approximately 1980 to 2010, however, the F-22, F-35 and other new fighters are all 5th generation fighters, which is the newest generation of fighter aircraft, and probably one of the last generations of manned fighters. Maybe that cleared us up a bit?
