"mikeos" wrote

The first electronic programmable computer - the Colossus - was
British built in 1943.

The first American computer of the same sort wasn't fully operational
until 1945.

Okay, "useful versions" applies here.

Colossus was "useful" enough to play a significant part in victory in WW2

The firing systems in WWII ships were basically analog computers too.
Good luck checking your email with them.

--Tedward