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RTEMS.org hosts the RTEMS Open Source Community
RTEMS was originally developed by and is currently enhanced and maintained by On-Line Applications Research Corporation (OAR). OAR has operated RTEMS as a truly Open Source Community process. To this end, OAR provides the infrastructure and governance to ensure community participation in the continual growth and improvement of RTEMS. We invite you to participate in the RTEMS Community.
Remember, even though you are able to download and use RTEMS for free, it takes time and costs money to maintain and distribute. When you purchase a support contract, attend an RTEMS class, or use OAR for RTEMS consulting services, you are helping to offset the expenses for maintaining the RTEMS project.