SINIX is a discontinued variant of theUnixoperating system fromSiemens Nixdorf Informationssysteme. SINIX supersedes SIRM OS andPyramid Technology'sDC/OSx. FollowingX/Open's acceptance that its requirements for the use of the UNIXtrademark were met, version 5.44 and subsequent releases were published asReliant UNIX byFujitsu Siemens Computers.

In some versions of SINIX (5.2x) the user could emulate the behaviour of a number of different versions of Unix (known asuniverses). These included System V.3,System III orBSD. Each universe had its own command set,libraries andheader files.

The original SINIX was a modified version ofXenix and ran onIntel 80186processors. For some years Siemens used theNSC-32x32 (up to Sinix 5.2x) and Intel 80486 CPUs (Sinix 5.4x - non MIPS) in their MX-Series.

Later versions of SINIX based onSystem V were designed for the:

• SNI RM-200, RM-300, RM-400 and RM-600 servers running on theMIPS processor (SINIX-N, SINIX-O, SINIX-P, SINIX-Y)
• SNI PC-MX2, MX300-05/-10/-15/-30, Siemens MX500-75/-85 runningNS320xx (SINIX-H)
• PC-MXi, MX300-45 on the IntelX86 processor (SINIX-L)
• SNI WX-200 and other IBM-compatible i386 PCs on theIntel 80386 and newer processors (SINIX-Z)

The last release under the SINIX name was version 5.43 in 1995.

The last Reliant UNIX versions were registered asUNIX 95 compliant (XPG4 hard branding).

The last release of Reliant UNIX was version 5.45.

• BS2000
• VM2000

• Siemens Business Services - SINIX patches and support
• The SINIX operating system
• Sven Mascheck,SINIX V5.20 Universes

• MIPS operating systems
• X86 operating systems
• UNIX System V

• Articles with short description
• Short description matches Wikidata