Supriya Ghosh (Editor)

Modula 2 +

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First appeared
  
1980s

Typing discipline
  
strong, static

Paradigm
  
imperative, structured, modular

Designed by
  
DEC Systems Research Center SRC and Acorn Research Center

Developer
  
DEC Systems Research Center SRC and Acorn Research Center

OS
  
Cross-platform (multi-platform)

Modula-2+ is a programming language descended from the Modula-2 language. It was developed at DEC Systems Research Center (SRC) and Acorn Computers Ltd Research Centre in Palo Alto, California. Modula-2+ is Modula-2 with exceptions and threads. The group who developed the language was led by P. Rovner in 1984.

Main differences with Modula-2:

  • Concurrency (different from the concept of coroutines which has already been there as a part of classic Modula-2)
  • Exception handling
  • Garbage collection
  • Implementations

    Modula-2+ has been used to develop Topaz, an operating system for the DEC SRC Firefly Multiprocessor. Most Topaz applications were written in the Modula-2+ programming language which grew along with the development of the system. Also to build a programming environment for it in the Acorn Research Center ARC. The language has now completely disappeared but was of great influence to other programming languages such as Modula-3.

    The original developers of Modula-2+ were both bought; Acorn by Olivetti and Digital Equipment Corporation by Compaq. Compaq itself was bought by Hewlett-Packard. Olivetti also sold the Olivetti Research Center and Olivetti Software Technology Laboratory (after bought Acorn ARC) to Oracle and was later absorbed by AT&T. DEC have made the SRC-reports available to the public.

    References

    Modula-2+ Wikipedia