Computer: Definition and History (Contd.). Lin Zhong ELEC101, Rice University. Electromechanical state. A combination of electrical and mechanical states Electromagnetic relay to change mechanical state Replay is a ON/OFF switch . Tabulating machine.
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Computer: Definition and History (Contd.)
ELEC101, Rice University
Rotor: 26 mechanical states corresponding to 26 letters
Electrical current flows through a series of rotors if their letter combination makes sense
ENIAC and vacuum tubes
Nobel Prize in Physics, 1956
Sunlin Chou, “Extending Moore’s Law in the Nanotechnology Era” (www.intel.com).
Smallest mass produced transistor 32nm
Computing: 60 years ago
Wiring ENIAC with a new program
Living among computers
“Computers” over $50 that serve me
Apple iPhone (2008)
IBM Thinkpad 770 (1998)
Collier et al, 2000