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The initial motive for developing APL was to provide a tool for writing and teaching. Although APL has been exploited mostly in commercial programming, I continue to believe that its most important use remains to be exploited: as a simple, precise, executable notation for the teaching of a wide range of subjects.

Kenneth E. Iverson

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Kenneth E. Iverson
Age: 83 †
Born: 1920
Born: December 17
Died: 2004
Died: October 19
Computer Scientist
Mathematician
Camrose
AB
Kenneth Eugene Iverson
Believe
Continue
Motive
Notation
Remains
Mostly
Exploited
Subjects
Range
Initial
Teaching
Developing
Initials
Simple
Provide
Precise
Use
Wide
Commercial
Important
Although
Programming
Writing
Tools
Tool

More quotes by Kenneth E. Iverson

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Most programming languages are decidedly inferior to mathematical notation and are little used as tools of thought in ways that would be considered significant by, say, an applied mathematician.
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It is important to distinguish the difficulty of describing and learning a piece of notation from the difficulty of mastering its implications. [...] Indeed, the very suggestiveness of a notation may make it seem harder to learn because of the many properties it suggests for exploration.
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If it is to be effective as a tool of thought, a notation must allow convenient expression not only of notions arising directly from a problem, but also of those arising in subsequent analysis, generalization, and specialization.
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With the computer and programming languages, mathematics has newly-acquired tools, and its notation should be reviewed in the light of them. The computer may, in effect, be used as a patient, precise, and knowledgeable native speaker of mathematical notation.
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Overemphasis of efficiency leads to an unfortunate circularity in design: for reasons of efficiency early programming languages reflected the characteristics of the early computers, and each generation of computers reflects the needs of the programming languages of the preceding generation.
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The utility of a language as a tool of thought increases with the range of topics it can treat, but decreases with the amount of vocabulary and the complexity of grammatical rules which the user must keep in mind. Economy of notation is therefore important.
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