class3-history

Class3-history - History of Computer Science The Telephone When was the telephone invented 1876 Who invented it Alexander Graham Bell What makes

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History of Computer Science
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The Telephone When was the telephone invented? 1876 Who invented it? Alexander Graham Bell What makes something a telephone? What was the key idea behind the telephone? transmission of sound on a wire the microphone and speaker
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The Airplane When was the airplane invented? 1903 Who invented it? The Wright Brothers What makes something an airplane? heavier-than-air craft capable of flight with stationary wings What is the key idea behind the airplane? airfoil, lift
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The Computer When was the computer invented? Who invented it?
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Some Candidates 1941 - Zuse Z3 (Germany) 1942 - Atanasoff-Berry Computer (US) 1944 - Colossus Mark 1 (UK) 1946 - ENIAC (US) 1949 - EDSAC (UK)
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The Computer What makes something a computer? What is the key idea behind the computer?
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Discrete States Computation depends on discrete states. Consider the robot's direction. How many possible states?
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Operations Computation consists of operations. The simplest operation we can perform is to copy a state. copy copy
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Noise In the real world, no operation is perfect. There is always noise. copy
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Fixing Errors If the robot's direction can only be one of 4 possible discrete values, and we see this: then we can fix it: Why can't we fix it if we allow the robot to point in ANY direction?
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Back to History "It is desirable to guard against the possibility of exaggerated ideas that might arise as to the powers of the [computer]. .. The
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This note was uploaded on 09/14/2010 for the course CS 15-100 taught by Professor Dave during the Spring '08 term at Carnegie Mellon.

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Class3-history - History of Computer Science The Telephone When was the telephone invented 1876 Who invented it Alexander Graham Bell What makes

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