Sintran (a portmanteau of SINTEF and Fortran; stylized as SINTRAN) is a range of operating systems (OS) for Norsk Data's line of minicomputers. The original version of Sintran, was written in the programming language Fortran, released in 1968, and developed by the Department of Engineering Cybernetics at the Norwegian Institute of Technology together with the affiliated research institute, SINTEF. The different incarnations of the OS shared only name, and to a degree, purpose.

Sintran
DeveloperNorsk Data,
Norwegian Institute of Technology, SINTEF
Written inFortran
Working stateDiscontinued
Source modelClosed-source
Initial release1968; 56 years ago (1968)
Final releaseFinal / 1992; 32 years ago (1992)
Available inEnglish
Update methodCompile from source code
PlatformsNorsk Data minicomputers, Nord-1 terminal servers
Kernel typeMonolithic
Default
user interface
Command-line
LicenseProprietary
Succeeded bySintran II, Sintran III

Norsk Data took part in developing Sintran II, a multi-user software system that constituted the software platform for the Nord-1 range of terminal servers. By far the most common version of the OS was Sintran III, developed solely by Norsk Data and launched in 1974. This real-time multitasking system was used for Norsk Data's server machines (such as the Nord-10, -100) for the remainder of the company's lifetime, i.e. until 1992.

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