THREADX has been deployed in excess of Billion deployments worldwide. General concepts and terminology are detailed along with problem solving and discussion of common pitfalls. The features and services of THREADX are covered, including threads, mutexes, semaphores, memory pools, application timers, message queues, event flags groups, preemption-threshold, event-chaining, and designing a multithreaded system. There are no references to specific processors to allow for the book to be technology agnostic, and applicable to all types of microprocessors that the reader may be working with. A THREADX Win32 Demo version and all project files used in the book are available for download.