No Computers=
No Electricity so hand tools only
No Fuel so no food in shops so no one to operate the hand tools
Don't need computers to generate electricity, useful in managing it.
Play along with the theoretical question.
Interesting in responses so far are indicative of well we will manage and it won't happen rather than seeing it as opportunity to see what we could do.
Given what is around cars, trucks, engines, metal could an Air Force be put together or has everybody quit ?