Try the Federation of American Scientists-
http://www.fas.org/man/dod-101/sys/index.html
Suggest doing a web search on specific weapons systems and regional history or specific conflicts, I'm sure you won't be disappointed.
Back in the old days before the internet, we had the local library or the odd copy of the AF Almanac (with the always interesting Soviet Aerospace Almanac), Naval Institutue Press's "Proceedings", Janes, and Aviation Week and Space Technology (not to mention those great Salamander weapons books). Ah, the good ol' days!
Yours, Mike
IYAAYAS!