Real-time Programming Language (RPL) is a compiled database programming language used on CMC/

Microdata Microdata can mean: * Microdata (statistics), a statistical term for individual response data in surveys and censuses * Microdata (HTML), a specification for semantic markup in HTML * Microdata Corporation Microdata Corporation was an American ...

McDonnell Douglas McDonnell Douglas was a major American aerospace manufacturing corporation and defense contractor, formed by the merger of McDonnell Aircraft and the Douglas Aircraft Company in 1967. Between then and its own merger with Boeing in 1997, it ...

REALITY

databases In computing, a database is an organized collection of data stored and accessed electronically. Small databases can be stored on a file system, while large databases are hosted on computer clusters or cloud storage. The design of databases spa ...

, derived and expanded from the PROC procedure language, with much extra functionality added. It was originally developed under the name "PORC" by John Timmons and Paul Desjardins in about 1975. "PORC" was then further developed by Tim Holland under the employ of George Ridgway's company Systems Management, Inc. (SMI) in Chicago. A number of large scale manufacturing applications were developed in RPL, including that which was in use at

Plessey The Plessey Company plc was a British electronics, defence and telecommunications company. It originated in 1917, growing and diversifying into electronics. It expanded after World War II by acquisition of companies and formed overseas compan ...

and GEC-Plessey Telecommunications limited in

Liverpool Liverpool is a City status in the United Kingdom, city and metropolitan borough in Merseyside, England. With a population of in 2019, it is the List of English districts by population, 10th largest English district by population and its E ...

and also the

Trifid Trifid is Latin for "split into three parts" or "threefold" and may refer to: * ''Trifid'' (journal), a Czech-language periodical *Trifid Nebula in the constellation Sagittarius *Trifid cipher, a fractionated cipher * Trifid (software), suite of m ...

suite of manufacturing software.

Sources

RPL 1.3 Reference Manual (PDF)"Software House Puts Emphasis on Nitty-Gritty", 10 Sep 1979
Programming languages {{prog-lang-stub