Administrative technology seems fine, as it has everything to do with improving the stability and infrastructure of your country.
Military technology on the other hand doesn't make sense. The term "Military" covers land, sea and air, but here it only covers land. Why not name it what it is, Land or Army Technology?
Diplomatic Technology is even more odd. Diplomacy has always been around since the dawn of man and isn't really something I would consider a technology. Wether it's about administration, warfare or trade, diplomacy will always be a part of it. Is diplomacy less relevant if you're a land based Austria compared to a seafaring England? I just don't see why trade and naval techs have been named "diplomatic" when Naval technology would be more suitable.
Administrative Technology, Naval Technology and Land technology would make more sense in my head at least