RTEMS
| Developer | OAR Corporation |
|---|---|
| Written in | C |
| OS family | Real-time operating system |
| Working state | Current |
| Source model | Open source |
| Initial release | 1993 |
| Latest release | 6.1 / January 22, 2025 |
| Repository | gitlab |
| Marketing target | Embedded systems |
| Available in | English |
| Platforms | ARM, Blackfin, ColdFire, TI C3x/C4x, H8/300, x86, 68k, LatticeMico32, Microblaze, MIPS Nios II, OpenRISC, PowerPC, SuperH, SPARC (ERC32, LEON), SPARC64 |
| Kernel type | Real-time |
| Default user interface | Command-line |
| License | BSD 2 Paragraph |
| Official website | www |
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. It is free and open-source software.
Development began in the late 1980s with early versions available via File Transfer Protocol (ftp) as early as 1993. OAR Corporation managed the RTEMS project in cooperation with a steering committee until the early 2000's when project management evolved into a subset of the core developers managing the project. In 2014, hosting was moved from OAR Corporation to the Oregon State University Open Source Lab hosting.