| Modula-2+ | |
| Paradigms: | imperative, structured, modular, data and procedure hiding, concurrent |
| Family: | Wirth Modula |
| Designers: | Paul Rovner, Roy Levin, John Wick |
| Developer: | DEC Systems Research Center (SRC) Acorn Research Center |
| Typing: | Static, strong, safe |
| Scope: | Lexical |
| Discontinued: | Yes |
| Operating System: | Cross-platform |
| License: | Proprietary |
| File Formats: | --> |
| Implementations: | DEC SRC Modula-2+, CAMEL (C and Modula Exexcution Library) |
| Dialects: | DEC SRC |
| Influenced By: | Pascal, ALGOL, Modula-2 |
| Influenced: | Modula-3 |
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 which developed the language was led by P. Rovner in 1984.[1]
Main differences with Modula-2:
Modula-2+ was used to develop Topaz, an operating system for the SRC DEC Firefly shared memory asymmetric multiprocessing workstation.[3] Most Topaz applications were written in Modula-2+, which grew along with the development of the system.[4] Modula-2+ was also used by Acorn in the ARX operating system, and to build an integrated development environmentin the Acorn Research Center (ARC).[5] Modula-2+ strongly influenced other languages such as Modula-3, but as of 2005, it had disappeared.
The original developers of Modula-2+ were both acquired: Acorn by Olivetti and Digital Equipment Corporation by Compaq. Compaq was bought by Hewlett-Packard. Olivetti sold the Olivetti Research Center and Olivetti Software Technology Laboratory (after bought Acorn ARC) to Oracle Corporation and was later absorbed by AT&T.[6] DEC have made the SRC-reports available to the public.