Revelation BASIC

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Advanced Revelation (AREV) used a programming language called R/Basic, which is a descendant of the BASIC programming language (via the Pick operating system) that was developed by Revelation Software for use with the DOS operating systems. It was modeled after the Pick operating system and compiler. Compared to BASIC, it added an improved Integrated Development Environment (IDE), database support, and extended string handling.

Cosmos released the first version of Revelation in 1982 in the form of a 5.25" floppy disk. Revelation came with a markedly different IDE from the one supplied with previous versions of BASIC. Line numbers were no longer needed since users could insert and remove lines directly via an onscreen text editor. Revelation also came with a built-in multi-user database using multi-valued variable-length fields, following the model of the Pick operating system. It also provided the ability to create data dictionaries and user-modifiable execution vocabularies.

Revelation's compiler could be used to compile programs into pseudo-code which would be validated and run faster than an interpreter.

The last character-based version of Revelation was called Advanced Revelation version 3.12, which was released in 1995. AREV has since been superseded by OpenInsight, which is a Windows based version of the language.

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