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RISC/os
 
 
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RISC/os was a UNIX
Unix

Unix is a computer operating system originally developed in 1969 by a group of American Telephone & Telegraph employees at Bell Labs, including Ken Thompson , Dennis Ritchie, Douglas McIlroy, and Joe Ossanna....
 operating system
Operating system

An operating system is an interface between hardware and applications; it is responsible for the management and coordination of activities and the sharing of the limited resources of the computer....
 distributed by MIPS Computer Systems, Inc.
MIPS Technologies

MIPS Technologies, Inc. , formerly MIPS Computer Systems, is most widely known for developing the MIPS architecture and a series of pioneering Reduced instruction set computer Central processing unit....
 during the 1980s and 1990s for use with their computer workstation
Workstation

A workstation is a high-end microcomputer designed for technical or scientific applications. Intended primarily to be used by one person at a time, they are commonly connected to a local area network and run multi-user operating systems....
s and server
Server (computing)

A server is a computer program that provides services to other computer programs , in the same or other computer. The physical computer that runs a server program is also often referred to as server....
s, such as the M/120 server or MIPS Magnum
MIPS Magnum

The MIPS Magnum was a line of computer workstations designed by MIPS Technologies and based on the MIPS architecture series of RISC microprocessors....
 workstation. It was also sometimes referred to as UMIPS.

RISC/os was based largely on UNIX System V
UNIX System V

Unix System V, commonly abbreviated SysV , is one of the versions of the Unix operating system. It was originally developed by AT&T and first released in 1983....
 with additions from 4.3BSD
Berkeley Software Distribution

Berkeley Software Distribution is the Unix operating system derivative developed and distributed by the Computer Systems Research Group of the University of California, Berkeley, from 1977 to 1995....
 UNIX, ported to the MIPS architecture
MIPS architecture

MIPS is a RISC instruction set architecture developed by MIPS Technologies . In the mid to late 1990s, it was estimated that one in three RISC microprocessors produced were MIPS implementations....
. The RISC/os user environment could be configured for compatibility with either System V Release 3, 4.3BSD, or (in later versions) System V Release 4.

Because of this early UNIX heritage, RISC/os was limited in comparison to modern UNIX variants — for example, even the last releases of RISC/os did not support shared libraries
Library (computer science)

In computer science, a library is a collection of subroutines or Class used to develop software. Libraries contain code and data that provide services to independent programs....
.

After the acquisition of MIPS Computer Systems by Silicon Graphics
Silicon Graphics

Silicon Graphics, Inc. is a company manufacturer high-performance computing solutions, including computer hardware and computer software. SGI was founded by James H....
 in 1992, MIPS' own workstation and server product lines were phased out, and with them, RISC/os.








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Encyclopedia


RISC/os was a UNIX
Unix

Unix is a computer operating system originally developed in 1969 by a group of American Telephone & Telegraph employees at Bell Labs, including Ken Thompson , Dennis Ritchie, Douglas McIlroy, and Joe Ossanna....
 operating system
Operating system

An operating system is an interface between hardware and applications; it is responsible for the management and coordination of activities and the sharing of the limited resources of the computer....
 distributed by MIPS Computer Systems, Inc.
MIPS Technologies

MIPS Technologies, Inc. , formerly MIPS Computer Systems, is most widely known for developing the MIPS architecture and a series of pioneering Reduced instruction set computer Central processing unit....
 during the 1980s and 1990s for use with their computer workstation
Workstation

A workstation is a high-end microcomputer designed for technical or scientific applications. Intended primarily to be used by one person at a time, they are commonly connected to a local area network and run multi-user operating systems....
s and server
Server (computing)

A server is a computer program that provides services to other computer programs , in the same or other computer. The physical computer that runs a server program is also often referred to as server....
s, such as the M/120 server or MIPS Magnum
MIPS Magnum

The MIPS Magnum was a line of computer workstations designed by MIPS Technologies and based on the MIPS architecture series of RISC microprocessors....
 workstation. It was also sometimes referred to as UMIPS.

RISC/os was based largely on UNIX System V
UNIX System V

Unix System V, commonly abbreviated SysV , is one of the versions of the Unix operating system. It was originally developed by AT&T and first released in 1983....
 with additions from 4.3BSD
Berkeley Software Distribution

Berkeley Software Distribution is the Unix operating system derivative developed and distributed by the Computer Systems Research Group of the University of California, Berkeley, from 1977 to 1995....
 UNIX, ported to the MIPS architecture
MIPS architecture

MIPS is a RISC instruction set architecture developed by MIPS Technologies . In the mid to late 1990s, it was estimated that one in three RISC microprocessors produced were MIPS implementations....
. The RISC/os user environment could be configured for compatibility with either System V Release 3, 4.3BSD, or (in later versions) System V Release 4.

Because of this early UNIX heritage, RISC/os was limited in comparison to modern UNIX variants — for example, even the last releases of RISC/os did not support shared libraries
Library (computer science)

In computer science, a library is a collection of subroutines or Class used to develop software. Libraries contain code and data that provide services to independent programs....
.

After the acquisition of MIPS Computer Systems by Silicon Graphics
Silicon Graphics

Silicon Graphics, Inc. is a company manufacturer high-performance computing solutions, including computer hardware and computer software. SGI was founded by James H....
 in 1992, MIPS' own workstation and server product lines were phased out, and with them, RISC/os.

See also

  • Timeline of operating systems