PAL (programming language)
| Pedagogic Algorithmic Language (PAL) | |
|---|---|
| Paradigms | functional, imperative |
| Designed by | Original: Peter Landin, James H. Morris, Jr. Redesign: Martin Richards, Thomas J. Barkalow, Arthur Evans, Jr., Robert M. Graham, James Morris, John Wozencraft |
| Developer | Massachusetts Institute of Technology |
| First appeared | 1967 |
| Final release | RPAL 0.2.0-rc1
/ 4 October 2006 |
| Typing discipline | dynamic |
| Scope | lexical |
| Implementation language | Original: Lisp Redesign: BCPL |
| Platform | IBM 7090, 7094; System/360 |
| OS | Compatible Time-Sharing System, BOS/360, TOS/360, DOS/360, OS/360 |
| Website | rpal |
| Dialects | |
| Right-reference Pedagogic Algorithmic Language (RPAL) | |
| Influenced by | |
| ISWIM | |
PAL, the Pedagogic Algorithmic Language, is a programming language developed at the Massachusetts Institute of Technology in around 1967 to help teach programming language semantics and design.[1][2] It is a "direct descendant" of ISWIM and owes much of its philosophy to Christopher Strachey.[3]
The initial implementation of PAL, in Lisp, was written by Peter Landin and James H. Morris, Jr. and ran on the Compatible Time-Sharing System (CTSS). It was later redesigned by Martin Richards, Thomas J. Barkalow, Arthur Evans, Jr., Robert M. Graham, James Morris, and John Wozencraft. It was implemented by Richards and Barkalow in BCPL as an intermediate-code interpreter and ran on the IBM System/360; this was called PAL/360.[4]
RPAL
[edit]The Right-reference Pedagogic Algorithmic Language (RPAL), is a functional programming subset of PAL with an implementation on SourceForge.[5] It is used at the University of Florida to teach the construction of programming languages and functional programming. Programs are strictly functional, with no sequence or assignment operations.
References
[edit]- ^ Evans, Arthur Jr. (February 1968). "PAL: Pedagogic Algorithmic Language: A Reference Manual and a Primer" (PDF). Computer History Museum: Software Preservation Group. Mountain View, California: Department of Electrical Engineering, MIT. Retrieved 10 November 2022.
- ^ John M. Wozencraft and Arthur Evans, Jr. Notes on Programming Linguistics. Unpublished report, Department of Electrical Engineering, MIT. February, 1971.
- ^ Arthur Evans, Jr., "PALโa language designed for teaching programming linguistics" Proceedings of the 1968 23rd ACM National Conference (August 27โ29, 1968), p. 395-403 ACM abstract
- ^ "PAL (Pedagogic Algorithmic Language)". Computer History Museum, Software Preservation Group.
- ^ "RPAL - The Right-reference Pedagogic Algorithmic Language". SourceForge.