What were the primary work of mainframe computers in the 1950s through the 1960s?

In the 1950s and 1960s they dominated the computer science area in large corporations. Mainframes are capable of delivering processing services to thousands of users through thousands of terminals connected directly or across a network. They were widely used in war for ballistic calculations

c) legal battles last five weeks after the election due to the narrow victory in several states.

on april 6, 1917, the u.s. joined its allies--britain, france, and russia--to fight in world war i. under the command of major general john j. pershing, more than 2 million u.s. soldiers fought on battlefields in france.