Real-time operating systems

FlexOS was a modular real-time multi-user multi-tasking operating system (RTOS) designed for computer-integrated manufacturing, laboratory, retail and financial markets.

BlackBerry Tablet OS is an operating system from BlackBerry Ltd based on the QNX Neutrino real-time operating system designed to run Adobe AIR and BlackBerry WebWorks applications, currently available for the BlackBerry PlayBook tablet computer.

ChibiOS/RT is a compact and fast real-time operating system supporting multiple architectures and released under the GPL3 license.

RT-11 ("RT" for real-time) was a small, single-user real-time operating system for the Digital Equipment Corporation PDP-11 family of 16-bit computers.

Integrity and Integrity-178B are real-time operating systems (RTOSes) produced and marketed by Green Hills Software.

Symbian is a discontinued mobile operating system (OS) and computing platform designed for smartphones.

Windows Embedded Compact 7 (formerly known as Windows Embedded CE 7.0) is the seventh major release of Windows Embedded CE operating system.

RSX-11 is a discontinued family of real-time operating systems mainly for PDP-11 computers created by Digital Equipment Corporation (DEC), common in the late 1970s and early 1980s.

RTLinux is a hard realtime RTOS microkernel that runs the entire Linux operating system as a fully preemptive process.

Xenomai is a real-time development framework cooperating with the Linux kernel, to provide a pervasive, interface-agnostic, hard real-time support to user space applications, seamlessly integrated into the Linux environment.

BATCH-11/DOS-11, also known simply as DOS-11, is a discontinued operating system by Digital Equipment Corporation (DEC) of Maynard, Massachusetts.

Baget RTOS (rus. ОСРВ Багет) is a real-time operating system developed by the Scientific Research Institute of System Development of the Russian Academy of Sciences for a MIPS (Baget-MIPS variant) and Intel BSPs (x86 architecture).

Nucleus RTOS is a real-time operating system (RTOS) offered by the Embedded Software Division of Mentor Graphics for various central processing unit (CPU) platforms.

DRYOS is a real-time operating system made by Canon and is used in their latest digital cameras and camcorders.

FreeRTOS is a popular real-time operating system kernel for embedded devices, that has been ported to 35 microcontrollers.

Phantom OS is an operating system mostly made by Russian programmers.

Real-Time Executive for Multiprocessor Systems (RTEMS), formerly Real-Time Executive for Missile Systems, and then Real-Time Executive for Military Systems, is a real-time operating system (RTOS) designed for embedded systems.

OS-9 is a family of real-time, process-based, multitasking, multi-user operating systems, developed in the 1980s, originally by Microware Systems Corporation for the Motorola 6809 microprocessor.

The Embedded Configurable Operating System (eCos) is a free and open source real-time operating system intended for embedded systems and applications which need only one process with multiple threads.

RDOS (Real-time Disk Operating System) was a real-time operating system released in 1972 for the popular Data General Nova and Eclipse minicomputers.

Venix was a version of the Unix operating system for low-end computers, developed by VenturCom, a "company that specialises in the skinniest implementations of Unix".

XOberon is a real-time operating system for PowerPC, written in Oberon-2.

Windows Embedded Compact, formerly Windows Embedded CE and Windows CE, is an operating system subfamily developed by Microsoft as part of its Windows Embedded family of products.

BlackBerry 10 is a proprietary mobile operating system for the BlackBerry line of smartphones, both developed by BlackBerry Limited (formerly Research In Motion).

Bluebottle (formerly known as AOS and recently as A2) is an Operating System with unconventional features.

The LynxOS RTOS is a Unix-like real-time operating system from Lynx Software Technologies (formerly "LynuxWorks").

ChorusOS is a microkernel real-time operating system designed as a message-based computational model.

QNX (/ˌkjuː ˌɛn ˈɛks/ or /ˈkjuːnᵻks/) is a commercial Unix-like real-time operating system, aimed primarily at the embedded systems market.

The REX Operating System (Real-Time Executive Operating System) is an RTOS developed by Qualcomm for the ARM-based mobile phone Dual-Mode Subscriber Station (DMSS) or Advanced Mode Subscriber Software (AMSS) development.

RT-Thread is an open source real-time operating system for embedded devices.

RTAI, abbreviated from real-time application interface, is a real-time extension for the Linux kernel, which lets users write applications with strict timing constraints for Linux.

Talon DSP RTOS is a commercial POSIX-compliant Unix-like real-time operating system, aimed primarily at the DSP market.

LINX is a new generation of the OSE Link Handler for Inter-process communications (IPC) that provides high performance and robust functionality developed by ENEA AB in Sweden.

S.Ha.R.K. (the acronym stands for Soft Hard Real-time Kernel) is a completely configurable kernel architecture designed for supporting hard, soft, and non real-time applications with interchangeable scheduling algorithms.

Multiuser DOS is a real-time multi-user multi-tasking operating system for IBM PC-compatible microcomputers.

Micro-Controller Operating Systems (MicroC/OS, stylized as µC/OS) is a real-time operating system (RTOS) designed by embedded software developer, Jean J.

μT-Kernel is a real-time operating system (RTOS) designed for 16- and 8-bit microcontrollers.

Multi-Environment Real-Time (MERT) was a hybrid time-sharing/real-time operating system developed in the 1970s at Bell Labs for use in embedded minicomputers (in particular PDP-11s).

BeOS is an operating system for personal computers first developed by Be Inc.

pSOS (Portable Software On Silicon) is a real time operating system (RTOS), created in about 1982 by Alfred Chao, and developed/marketed for the first part of its life by his company Software Components Group (SCG).

FunkOS is a real-time operating system (RTOS) developed by Funkenstein Software Consulting, targeting a variety of microcontroller architectures.

NuttX is a real-time operating system (RTOS) with an emphasis on standards compliance and small footprint.

OS4000 is a proprietary operating system introduced by GEC Computers Limited in 1977 as the successor to GEC DOS, for its range of GEC 4000 series 16-bit, and later 32-bit, minicomputers.

The Wombat Operating System is a high-performance virtualized Linux marketed by Open Kernel Labs, a spin-off of National ICT Australia (NICTA) - Australia’s prestigious Center of Excellence for Information and Communications Technology's Embedded, Real Time, Operating System Program.

The eXtreme Minimal Kernel (XMK) is a real-time operating system (RTOS) that is designed for minimal RAM/ROM use.

ScreenOS is a real-time embedded operating system for the NetScreen range of hardware firewall devices from Juniper Networks.

TPF is an IBM real-time operating system for mainframe computers descended from the IBM System/360 family, including zSeries and System z9.

Zephyr is a small real-time operating system for connected, resource-constrained devices supporting multiple architectures and released under the Apache License 2.

Fuchsia is an operating system currently being developed by Google.

DNIX (original spelling: D-Nix) was a Unix-like real-time operating system from the Swedish company Dataindustrier AB (DIAB).

DSPnano is an embedded real-time operating system (RTOS) which is compatible with POSIX and embedded Linux.

DSOS (Deep Six Operating System) was a real-time operating system (sometimes referred to as an operating system kernel) developed by Texas Instruments' Geophysical Services division (GSI) in the mid-1970s.

OpenComRTOS is a commercial network-centric, formally developed real-time operating system, aimed primarily at the embedded systems market.

Oryx/Pecos is a proprietary operating system developed from scratch by Bell Labs beginning in 1978 for the express purpose of running AT&T's large-scale PBX switching equipment.

QP (Quantum Platform) is a family of lightweight, open source software frameworks for building responsive and modular real-time embedded applications as systems of cooperating, event-driven active objects (actors).

PikeOS is a microkernel-based real-time operating system made by SYSGO AG.

BeRTOS is a real-time operating system designed for embedded systems.

Versatile Real-Time Executive (VRTX) is a real-time operating system developed and marketed by the company Mentor Graphics.

The Phoenix-RTOS is a state-of-the-art, fully proprietary, real-time operating system designed specifically to improve the way of designing Internet of Things devices.

UNOS is the first, now discontinued, 32-bit Unix-like real-time operating system (RTOS) with real-time extensions.

iRMX is a real-time operating system designed specifically for use with the Intel 8080 and Intel 8086 family of processors.

MQX RTOS is a real-time operating system developed by Precise Software Technologies Inc.

The INtime /ˈɪntim/ IN-time Real Time Operation System (RTOS) family is based on a 32 bit RTOS conceived to run time-critical operations cycle-times as low as 50μs.

eComStation or eCS is a PC operating system based on OS/2, published by Serenity Systems and Mensys BV and currently owned and developed by XEU.

Lynx Software Technologies, Inc.

RTX is a line of real-time operating system (RTOS) extensions by the firm IntervalZero.

ERIKA Enterprise is an open-source and royalty-free OSEK/VDX Kernel.

TI-RTOS is an embedded tools ecosystem created and offered by Texas Instruments (TI) for use in a wide range of their embedded processors.

The Operating System Embedded (known by the acronym Enea OSE) is a real-time embedded operating system created by the Swedish information technology company ENEA AB.

IntervalZero, Inc.