It combined the high speed of electronics with the ability to be programmed for many complex problems. It could add or subtract 5000 times a second, a thousand times faster than any other machine. It also had modules to multiply, divide, and square root. High speed memory was limited to 20 words (about 80 bytes). Built under the direction of John Mauchly and J. Presper Eckert at the University of Pennsylvania, ENIAC's development and construction lasted from 1943 to full operation at the end of 1945. The machine was huge, weighing 30 tons, using 200 kilowatts of electric power and contained over 18,000 vacuum tubes, 1,500 relays, and hundreds of thousands of resistors, capacitors, and inductors. COUNT 5
QSN1 How many times could it add or subtract a second? ANS1 5000 QSN2 What was the limit of its high speed memory? ANS2 ENIAC QSN3 ENIAC was constructed by whom? ANS3 John Mauchly and J. Presper Eckert QSN4 Where did John Mauchly and J. Presper Eckert build the ENIAC? ANS4 University of Pennsylvania QSN5 When was ENIAC fully operational? ANS5 1945