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␈↓↓␈↓α␈↓β␈↓∧␈↓α␈↓ ↓H
"The Analytical Engine [the Computer] has no pretensions␈↓ ↓H
whatever to originate anything.  It can do whatever we know␈↓ ↓H
how to order it to perform."  Lady Lovelace in 1844␈↓ ↓H
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"Apart from the question of its saving labour in operations␈↓ ↓H
now possible, we think that the existance of an instrument␈↓ ↓H
of this kind would place within reach much which, if not␈↓ ↓H
actually impossible, has been too close to the limits of␈↓ ↓H
human endurance to be practically available."  A committee␈↓ ↓H
of the British Association in 1872␈↓ ↓H
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"Man has in a single generation found himself sharing␈↓ ↓H
the world with a strange new species: the computer and␈↓ ↓H
computer-like machines."  Marvin Minsky␈↓ ↓H
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SLIDE 2␈↓ ↓H
␈↓αComputers vs Calculators␈↓ ↓H
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1. Size and cost␈↓ ↓H
2. Permanent files␈↓ ↓H
3. The stored program␈↓ ↓H
4. Multiplicity of steps␈↓ ↓H
5. Alternate paths through program␈↓ ↓H
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SLIDE 4.␈↓ ↓H
The four parts of a computer␈↓ ↓H
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1.  The arithmetic unit␈↓ ↓H
2.  The storage unit or units␈↓ ↓H
3.  The input-output mechanisms␈↓ ↓H
4.  The comparison and switching unit.␈↓ ↓H
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SLIDE 5.␈↓ ↓H
␈↓α "The Analytical Engine [the Computer]␈↓ ↓H
has no pretensions whatever to originate␈↓ ↓H
anything.  It can do whatever we know how␈↓ ↓H
to order it to perform."   Lady Lovelace␈↓ ↓H
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As true today as it was in 1844!␈↓ ↓H
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SLIDE 6.␈↓ ↓H
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␈↓αWhy use Computers?␈↓ ↓H
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1. People are too slow␈↓ ↓H
2. People make mistakes␈↓ ↓H
3. People are too expensive␈↓ ↓H
4. Not enough people to do the work␈↓ ↓H
5. Computers actually create more jobs␈↓ ↓H
6. Many things impossible without computers␈↓ ↓H
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SLIDE 7.␈↓ ↓H
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␈↓↓Speed, Accuracy and Reliability␈↓ ↓H
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1. One million times as fast␈↓ ↓H
2. One million times as accurate␈↓ ↓H
3. Computers usually do not get sick␈↓ ↓H
4. Automatic error checking techniques␈↓ ↓H
5. Cross-footing and Double-entry techniques␈↓ ↓H
6. Computers are often blamed for human errors␈↓ ↓H
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SLIDE 8.␈↓ ↓H
␈↓αWhat You Should Know about Computers␈↓ ↓H
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␈↓β1.  Early history␈↓ ↓H
␈↓α2.  The difference between computers and calculators␈↓ ↓H
3.  The 4 parts of any computer␈↓ ↓H
4.  Why do we need computers?␈↓ ↓H
5.  The speed and accuracy of the modern computer␈↓ ↓H
6.  Programming␈↓ ↓H
7.  What computers are now doing␈↓ ↓H
8.  What computers will be doing soon␈↓ ↓H
9.  The long range future of computers␈↓ ↓H
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