A real-time operating system or RTOS (sometimes known as a real-time executive or kernel) is a library of functions that implements rules and policies concerning time-critical allocation of a computer systems resources.
The intent of this document is to provide a top-level overview of real-time operating systems.
preview:
http://www.quadros.com/pdf/article_Quadros-RTOS_2006-09.pdf
9/21/2006