{{Template:Wikipedia|Protel}} '''Protel''' stands for "Procedure Oriented Type Enforcing Language". It is a programming language created by [[wp:Nortel Networks|Nortel Networks]] and used on telecommunications switching systems such as the [[wp:DMS-100|DMS-100]].{{cite book|last=Krishna|first=Sundeep Sahay, Brian Nicholson, S.|title=Global IT outsourcing : software development across borders|year=2003|publisher=Cambridge University Press|location=Cambridge|isbn=978-0521816045|page=7}}{{Citation | journal = Telesis | issue = 3 | year = 1989 }} Protel-2 is the object-oriented version of Protel.[http://portal.acm.org/citation.cfm?id=802525 “Experience with a modular typed language: PROTEL”], ICSE '81 Proceedings of the 5th international conference on Software engineering {{cite book|last=Dini|first=P.|title=Feature interactions in telecommunications networks IV|year=1997|publisher=IOS Press|location=Amsterdam|isbn=978-9051993479|page=23|coauthors=Boutaba, R.; Technologies, L. Logrippo ; sponsored by IEEE Communication Society, Centre de recherche informatique de Montréal ; with the participation of University of Ottawa, Université de Montréal, Bell Laboratories, Lucent}}

PROTEL languages were designed to meet the needs of digital telephony and is the basis of the [[wp:DMS-100|DMS-100]] line of switching systems PROTEL is a strongly-typed, block-structured language which is based heavily on [[Pascal|PASCAL]] and [[ALGOL 68]] with [[wp:reverse polish notation|reverse polish notation]] style of variable assignment. The designers of PROTEL significantly extended PASCAL of the day by adding external compilation and extending the data structures available in the language.

== References == {{Reflist}}

[[Category:Procedural programming languages]] [[Category:Nortel]] [[Category:Programming languages created in the 20th century]]