154 ◾ Computing
secret at the Moore School of Electrical Engineering. Mauchly and Eckert
were the chief consultant and the chief engineer of the project, respec-
tively. e machine took about a year to design, and another 18 months
and $500,000 to build, with completion coming in November 1945. e
ENIAC continued to be used to perform various calculations for advanced
military research projects aer the war was over [1, 6, 10, 15].
e size of the ENIAC was remarkable. It contained 17,468 vacuum
tubes, 7,200 crystal diodes, 70,000 resistors, 10,000 capacitors, 1,500 relays,
6,000 manual switches, and 5 million soldered joints. e machine cov-
ered 1,800 square feet (167 square meters) of oor space, weighed 30 tons,
and consumed 160 kilowatts ...