1. <language, mathematics> A language for constructive mathematics developed by Constable at Cornell University in the 1980s.
2. <language, real-time> Process and Experiment Automation Real-Time Language.
3. <language, education> One of five pedagogical languages based on Markov algorithms, used in "Nonpareil, a Machine Level Machine Independent Language for the Study of Semantics", B. Higman, ULICS Intl Report No ICSI 170, U London (1968). Compare Brilliant, Diamond, Nonpareil, Ruby.
4. <language> A multilevel language developed by Brian Randell ca 1970 and mentioned in "Machine Oriented Higher Level Languages", W. van der Poel, N-H 1974.
5. <language, tool, history> An obsolete term for Larry Wall's PERL programming language, which never fell into common usage other than in typographical errors. The missing 'a' remains as an atrophied remnant in the expansion "Practical Extraction and Report Language".
["Programming Perl", Larry Wall and Randal L. Schwartz, O'Reilly & Associates, Inc. Sebastopol, CA. ISBN 0-93715-64-1].
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Nearby terms: peak envelope power « Peano « Peano arithmetic « PEARL » Pebble » Pebbleman » PEBCAK