IRIX 3
Linux 17
LynxOS 5
QNX 18
| | POSIX - Realtime, Operating Systems, Software, Computers 7
Unix - Operating Systems, Software, Computers 941
 Concurrent Computer Corp.Concurrent Computer Corp.
 Makes PowerMAX OS: fully preemptive, multi-threaded, Unix-based RTOS. Leading provider of concurrent real-time multiprocessor OSs, high-performance real-time computer systems, solutions, software for business and government. Focus: strategic business areas including: simulation; data acquisition; instrumentation and process control; interactive real-time (includes wagering, gaming, video-on-demand); vibration control.
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MarutiMaruti
 Goal: create an environment for developing and deploying critical applications with hard real-time constraints in a reactive environment. Such applications must be able to execute on a platform of distributed and heterogeneous resources, and operate continuously in the presence of faults.
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RTMX, Inc.RTMX, Inc.
 Makes RTMX O/S: IEEE POSIX realtime extensions to OpenBSD, with vendor specific ports for embedded, dedicated systems, application specific Internet/intranet servers. Many fine features. North Carolina, USA.
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