| Company / developer | Siemens Nixdorf Informationssysteme, Fujitsu Siemens Computers |
|---|---|
| OS family | UNIX System V |
| Working state | Discontinued |
| Source model | Closed source |
| Initial release | ? |
| Latest stable release | 5.43 (SINIX), 5.45 (Reliant UNIX) / 1995 (SINIX) |
| Supported platforms | NSC-32x32, Intel 80186, Intel 80386, Intel 80486, MIPS |
| Kernel type | Monolithic kernel |
| License | Proprietary |
| Official website | Reliant UNIX/SINIX |
SINIX (later renamed to Reliant UNIX) was a variant of the Unix operating system from Siemens Nixdorf Informationssysteme. Supersedes SIRM OS and Pyramid Technology's DC/OSx. Its last release under the SINIX name was version 5.43 in 1995. Following X/Open's acceptance that its requirements for the use of the UNIX trademark were met, version 5.44 and subsequent releases were published as Reliant UNIX by Fujitsu Siemens Computers. The last release of Reliant UNIX was version 5.45.
The original SINIX was a modified version of Xenix and ran on Intel 80186 processors. For some years Siemens used the NSC-32x32 (up to Sinix 5.2x) and Intel 80486 CPUs (Sinix 5.4x - non MIPS) in their MX-Series. Later versions based on System V were designed for the SNI RM-200, RM-300, RM-400 and RM-600 servers running on the MIPS processor (SINIX-N, SINIX-O, SINIX-P, SINIX-Y) and for the PC-MXi on the Intel 80386 processor (SINIX-L).
In some versions of SINIX (5.2x) the user could emulate the behaviour of a number of different versions of Unix (known as universes). These included System V.3, System III or BSD. Each universe had its own command set, libraries and header files.
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