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RISC OS 4 RISCOS Ltd, Pace plc: 1999 RISC OS 4.39 2004: Bundled with hardware, then sold separately at £70 (US$127) Proprietary: Education, personal computer: RISC OS 5 Castle Technology, RISC OS Open: 2002 RISC OS 4 5.28 [6] 2020: No cost: Apache-2.0: Education, personal computer: RISC OS 6 RISCOS Ltd 2006 RISC OS 4 6.20 2009
Originally MS-DOS was designed to be an operating system that could run on any computer with a 8086-family microprocessor.It competed with other operating systems written for such computers, such as CP/M-86 and UCSD Pascal.
Name License Source model Target uses Status Platforms Apache Mynewt: Apache 2.0: open source: embedded: active: ARM Cortex-M, MIPS32, Microchip PIC32, RISC-V: BeRTOS: Modified GNU GPL: open source
OS/VS (port of OS/360 targeted for the System/370 virtual memory architecture (OS/370 is not the correct name for OS/VS1 and OS/VS2.) OS/VS has the following variations: OS/VS1 (Operating System/Virtual Storage 1, Virtual-memory version of OS/360 MFT II) OS/VS1 Basic Programming Extensions (BPE) adds device support and VM handshaking; OS/VS2 ...
Freedows OS–Windows clone ReactOS –project to develop an operating system that is binary compatible with application software and device drivers for Microsoft Windows NT version 5.x Wine (software) –compatibility layer which allows to execute programs that were originally written for Microsoft Windows
OS: left eye (from Latin oculus sinister) orthopedic surgery: overall survival OSA: obstructive sleep apnea: OSH: outside hospital Osm: osmolarity: Osteo: osteomyelitis: OT: occupational therapy: OTC: over-the-counter drug: OTD: out the door (discharged) OTPP: oriented to time, place, and person OTTR: Organ Transplant Tracking Record OU: both ...
The following tables compare general and technical information for a number of widely used and currently available operating system kernels. Please see the individual products' articles for further information.
The OS/360 also was the first popular operating system to support multiprogramming, such that the CPU could be put to use on one job while another was waiting on input/output (I/O). Holding multiple jobs in memory necessitated memory partitioning and safeguards against one job accessing the memory allocated to a different one.