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DeveloperPyramid Technology
OS familyUnix System V
Working stateHistorical
Source modelClosed source
Initial release1989
Marketing targetNetwork Server
PlatformsMIPS architecture
Kernel typeMonolithic kernel

DC/OSx (DataCenter/OSx) is a discontinued Unix operating system for MIPS based systems developed by Pyramid Technology in 1989.[1] It ran on its Nile series of SMP machines and was a port of AT&T System V Release 4 (SVR4). In 1995, Pyramid Technology was acquired by Siemens Nixdorf Informationssysteme (SNI), and DC/OSx was superseded by the SINIX operating system.


DC/OSx was the first symmetric multiprocessing (SMP) implementation on Unix System V Release 4.[2][3]

DC/OSx was later superseded by SINIX, a version of the Unix operating system from SNI.[4] Features of DC/OSx were incorporated into SINIX; later versions were branded as Reliant Unix.

See also[edit]


  1. ^ DiDio, Laura (27 February 1989). "Pyramid offers host-class processor based on Unix". Network World. IDG. p. 23-24. Retrieved 2 May 2024.
  2. ^ Dc/osx: Definition and additional resources from ZDNet
  3. ^ Pyramid: source of Nile - Pyramid Technology Corp. announces Nile Series of RISC-based symmetric multiprocessing servers - Client/Server Computing Edition
  4. ^ Siemens Nixdorf Bets On Intel And 64-Bit Solaris X86, Computergram International

External links[edit]