In a very loose sense, apart fom national defense- fast food was and is essentially a service contract- microwaves were first used on nuclear subs, and before them we had mass-produced so-called (Battleship style) French Fries- still popular and offered by Nathans. Fast-food is essentially a defense-industry development.
it has improved peoples lives so that they can live.
Yes. Glasses have certainly "improved" lives.
Now modern day submarines are more improved and better built with better technology that we have these days.
Isolation
The USN Gato class, WWII, nearly 200 built (includes the improved Balao models).
wait what am I doing
how?? yeah :]
You ARE using a computer, aren't you !
It improved technology.
You ARE using a computer, aren't you !
Cool movies?
it improved their lives by families gathering for weddings, funerals and holiday dances