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In 1968, APL\1130 became the first publicly available APL system, created by IBM for the IBM 1130. It became the most popular IBM Type-III Library software that IBM released. APL*Plus and Sharp APL
- Creating The APL Programming Language
- A Taste of APL
- How APL Was Implemented
- Applications of APL
- APL Praise and Criticism
- A Short Biography of Ken Iverson
- Bibliography
- Historical Source Code Releases
Iverson’s book “A Programming Language” 1uses a graphical notation that would have been difficult to directly use as a programming language for computers. He considered it an extension of matrix algebra, and used common mathematical typographic conventions like subscripts, superscripts, and distinctions based on the weight or font of characters. He...
APL is a concise high-level programming language that differs from most others developed in the 1960s in several respects: Order of evaluation:Expressions in APL are evaluated right-to-left, and there is no hierarchy of function precedence. For example, typing the expression 2×4+3 causes the computer to immediately type the resulting value 14 The v...
The first computer implementation of APL notation was a batch-oriented language interpreter written in FORTRAN in 1965 for the IBM 7090 mainframe computer, by Larry Breed at the IBM Research Center in Yorktown Heights NY and Philip Abrams, then a graduate student at Stanford University. The first interactive version was written soon after for the 7...
Even before it was a computer programming language, Iverson Notation was useful as a language for documenting algorithms for people. The classic example is the formal definition of the instruction-set architecture of the new IBM System/360 computer, which was published in an article in the IBM Systems Journal by Adin Falkoff, Ken Iverson, and Ed Su...
APL was not originally designed as a programming language. As Iverson said, With so many terse and unusual symbols, APL computer programs, like the mathematical notation that inspired it, has a conciseness and elegance many find appealing. APL attracts fanatic adherents. Alan Perlis (the first recipient of the ACM’s Turing Award, in 1966) was one: ...
Kenneth Eugene Iverson was born on December 17, 1920 on a farm near Camrose, Alberta, Canada. He was educated in rural one-room schools until the end of 9th grade, when he dropped out of school because it was the height of the Depression and there was work to do on the family farm. He later said the only purpose of continuing his schooling would ha...
K. E. Iverson, A Programming Language, John Wiley and Sons, Inc., 1962.APL is an array language, and one of the oldest programming languages still in use today, next to FORTRAN, Lisp and COBOL. APL uses its own curious-looking symbols, like ⍎⌽⍕⌈* ≡⍬, rather than reserved words written out in English like most other languages, like C or Python.
This language summary is intended to help programmers write applications in APL2. It documents General-Use Programming Interface and Associated Guidance Information provided by APL2. General-use programming interfaces allow the customer to write programs that obtain the services of APL2.
APL Products and Services IBM Silicon Valley Laboratory 555 Bailey Avenue ... o TCL - Tool Command Language Interface o TIME - Application Performance Analysis
APL2 is an IBM licensed program that processes APL language requests. APL is a general-purpose language that is used in applications as different as business data processing, system design, mathematical and scientific computing, and the teaching of mathematics. APL has been particularly useful in data base applications, where
Dec 19, 2023 · The IBM PALM processor. Although probably not well-known to the average computer use, APL (A Programming Language) is a multi-dimensional array-based language that uses a range of special...
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