Prex is a portable real-time operating system for embedded systems. The small, reliable, and low power kernel is written in the C language based on microkernel design. The file system, Unix process, and networking features are provided by user mode tasks. License: BSD License (revised) Changes: This release adds a POSIX layer on top of the Microkernel. Tiny Unix utilities (CmdBox) and embedded Libc were also added.

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