what are the uses of computer in fields of defense,commerce,sports,industry?

Question

explain in details

Answer 1

defense...
civil defense database...
anti hackers division,probing satellitte data at high speeds,which also means to ME a 3.4/3.9 second death penalty for the earth,for YOU all i can tell is it takes 3.4/3.9 seconds for a person from the antartic,with a 56k/28k connection to launch a bomb in the pacific with the enter button on his pc... that kinda stuff...for commerce sports and industrial purposes,i think you should know better...