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There is no such thing as a free variable.

Alan Perlis

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Alan Perlis
Age: 67 †
Born: 1922
Born: April 1
Died: 1990
Died: February 7
Computer Scientist
Mathematician
University Teacher
Pittsburg
Pennsylvania
Alan Jay Perlis
Alan J. Perlis
Variables
Free
Thing
Variable

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In software systems it is often the early bird that makes the worm.
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One can only display complex information in the mind. Like seeing, movement or flow or alteration of view is more important than the static picture, no matter how lovely.
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Optimization hinders evolution.
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FORTRAN is not a flower but a weed - it is hardy, occasionally blooms, and grows in every computer.
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In the long run, every program becomes rococo, and then rubble.
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A year spent in artificial intelligence is enough to make one believe in God.
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You think you KNOW when you learn, are more sure when you can write, even more when you can teach, but certain when you can program.
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One can't proceed from the informal to the formal by formal means.
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Optimization hinders evolution. Everything should be built top-down, except the first time. Simplicity does not precede complexity, but follows it.
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You can measure a programmer's perspective by noting his attitude on the continuing vitality of FORTRAN.
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If you have a procedure with 10 parameters, you probably missed some.
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In computing, turning the obvious into the useful is a living definition of the word frustration.
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When someone says, I want a programming language in which I need only say what I want done, give him a lollipop.
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Don't have good ideas if you aren't willing to be responsible for them.
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If your computer speaks English, it was probably made in Japan.
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Once you understand how to write a program get someone else to write it.
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Simplicity does not precede complexity, but follows it.
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When a professor insists computer science is X but not Y, have compassion for his graduate students.
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A good programming language is a conceptual universe for thinking about programming.
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There are two ways to write error-free programs only the third one works.
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