Unix 3
ChorusOS 5
eCos 5
IRIX 3
Linux 16
LynxOS 5
OpenBSD 97
QNX 16
RTEMS 6
ThreadX 4
VxWorks 4
| | POSIX - Operating Systems, Software, Computers 2
TRON - Realtime, Operating Systems, Software, Computers 8
 IntegrityIntegrity
 Secure, no royalty, for high reliability embedded systems; hardware memory protection to isolate and protect it and user tasks from incorrect operation by errors or tampering; object-oriented design allows verifying data security/integrity, communications, individual components, whole system; strict adherence to provable resource requirements. Green Hills Software, Inc.
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Integrity (Operating System)Integrity (Operating System)
) Growing article, with links to many related topics. Wikipedia.
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MaRTE OSMaRTE OS
 Realtime kernel for embedded uses, follows Minimal Real-Time POSIX.13 subset. Most code is Ada, but some C, assembly. Hardware access via Abstract Hardware Interface (HAL). Runs in cross development environment: PC Linux Host, bare 386 PC Target, Ethernet LAN link. [Open Source, GPL]
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REAL/IX PXREAL/IX PX
 A POSIX real-time operating system for x86/Pentium based systems. By Modcomp, Inc.
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S.Ha.R.K.S.Ha.R.K.
 Dynamic configurable kernel architecture to support hard/soft/non realtime use with interchangeable scheduling algorithms: fully modular in scheduling policies, aperiodic servers, concurrency control protocols; all not modular in most traditional OSs. Derived from HARTIK: HArd Real TIme Kernel. [Open Source, GPL]
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