|Developer||Siemens Nixdorf Informationssysteme, Fujitsu Siemens Computers|
|OS family||UNIX System V|
|Source model||Closed source|
|Latest release||5.43 (SINIX),
5.45 (Reliant UNIX) / 1995 (SINIX)
|Platforms||NSC-32x32, Intel 80186, Intel 80386, Intel 80486, MIPS|
|Kernel type||Monolithic kernel|
|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), for the PC-MXi on the Intel 80386 processor (SINIX-L) and for the SNI WX-200 and other IBM-compatible i386 PCs on the Intel 80386 and newer processors (SINIX-Z).
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.
- Reliant UNIX/SINIX manuals
- Siemens Business Services - SINIX patches and support
- Sven Mascheck, SINIX V5.20 Universes