Polymorphic Programming Language

Interactive, extensible programming language type

The Polymorphic Programming Language (PPL) was developed in 1969 at Harvard University by Thomas A. Standish. It is an interactive, extensible language with a base language similar to the language APL.^[1]

The assignment operator <- (or ←) has influenced the language S.^[2]

References

^ Standish, Thomas A. (August 1969). Christensen; Shaw (eds.). "Some features of PPL – a Polymorphic Programming Language". ACM SIGPLAN Notices. 4 (8) (Proceedings of Extensible Language Symposium ed.). ACM Digital Library: Association for Computing Machinery: 20–26. doi:10.1145/1115858.1115864. Retrieved 2018-06-23.
^ Chambers, John M. (November 1994). "Evolution of the S Language". Archived from the original (PostScript) on 2007-04-09. Retrieved 2009-05-06.

APL programming

Features

APL syntax and symbols
Direct function (dfn)
Code pages
Iverson bracket
Rank
Shared Variables

Implementations

Major	Dyalog APL APL2 → APLX SHARP APL NARS → NARS2000°
Dialects	A → A+° APLNext → VisualAPL ELI GNU APL° J° kdb+ K, Q Polymorphic Programming Language (PPL)

Community

Professional
associations

Association for Computing Machinery: SIGAPL
British APL Association

Organizations

Business	Analogic Corporation APL2000 CompuServe Digital Equipment Corporation (DEC) DNA Systems Dyalog Ltd. IBM I. P. Sharp Associates Kx Systems Micro Computer Machines (MCM) Science Research Associates Scientific Time Sharing Corporation (STSC) Soliton Incorporated Telecompute Integrated Systems, Inc. Time Sharing Resources (TSR)
Education	Carnegie Mellon University (CMU) University of Maryland