Question

Which among the following is the expanded form of ENIAC?
1. Electrical Numerical Integrator and Calculator
2. Electronic Numerical Integrator and Computer
3. Electronic Number Integrator and Computer
4. Electrical Number Integrator and Calculator

Answer 1

Correct Answer - Option 2 : Electronic Numerical Integrator and Computer

The correct answer is Electronic Numerical Integrator and Computer​.

• ENIAC stands for Electronic Numerical Integrator and Computer.
• Electronic Numerical Integrator and Computer was the first programmable, electronic, general-purpose digital computer.
• It was Turing-complete and able to solve "a large class of numerical problems" through reprogramming. 
• Although ENIAC was designed and primarily used to calculate artillery firing tables for the United States Army's Ballistic Research Laboratory (which later became a part of the Army Research Laboratory), its first program was a study of the feasibility of the thermonuclear weapon.

• ENIAC was invented by John Mauchly and J. Presper Eckert.
• ENIAC was first introduced on 15 February 1946.
• The ENIAC contained 17,468 vacuum tubes, along with 70,000 resistors, 10,000 capacitors, 1,500 relays, 6,000 manual switches, and 5 million soldered joints. 
• It covered 1,800 square feet (167 square meters) of floor space, weighed 30 tons, consumed 160 kilowatts of electrical power.