GENERAL KNOWLEDGE

Detailed explanation-1: -ENIAC – World War II sparked the creation of the next famous mainframe computer, the ENIAC. Although the ENIAC was not actually completed until a year after the war ended, it signaled the start of heavy government investment in mainframe development. The ENIAC remained in service for a decade.

Detailed explanation-2: -It and subsequent computers employing vacuum tubes are known as first-generation computers. (With 1, 500 mechanical relays, ENIAC was still transitional to later, fully electronic computers.) Completed by February 1946, ENIAC had cost the government $400, 000, and the war it was designed to help win was over.

Detailed explanation-3: -First Computers The first substantial computer was the giant ENIAC machine by John W. Mauchly and J. Presper Eckert at the University of Pennsylvania. ENIAC (Electrical Numerical Integrator and Calculator) used a word of 10 decimal digits instead of binary ones like previous automated calculators/computers.