D. The Electronic Age: 1940 - Present.

• · Electronic Numerical Integrator and Computer (ENIAC)
• 1946.
• Used vacuum tubes (not mechanical devices) to do its calculations.
• Hence, first electronic computer.
• Developers John Mauchly, a physicist, and J. Prosper Eckert, an electrical engineer
• The Moore School of Electrical Engineering at the University of Pennsylvania
• Funded by the U.S. Army.
• But it could not store its programs (its set of instructions)

1. First Tries.
• Early 1940s
• Electronic vacuum tubes.
2. Eckert and Mauchly.

1. The First High-Speed, General-Purpose Computer Using Vacuum Tubes:
Electronic Numerical Integrator and Computer (ENIAC)
The ENIAC team (Feb 14, 1946). Left to right: J. Presper Eckert, Jr.; John Grist Brainerd; Sam Feltman; Herman H. Goldstine; John W. Mauchly; Harold Pender; Major General G. L. Barnes; Colonel Paul N. Gillon.