TenAsys (rhymes with tenacious) is a privately owned company providing real-time software and services based on the x86 Intel Architecture and Microsoft Windows operating system.

TenAsys develops real-time operating system (RTOS) products designed to merge two separate computing platforms into one.

Intel developed iRMX in the late 1970s and originally released it in 1980 to support and create demand for their processors and Multibus system platforms.

Upon initialization, it sets up a separate execution environment, takes over the CPU, and encapsulates Windows as the lowest priority iRMX task.

Windows application threads communicate with their real time counterparts on the INtime kernel through a special API that facilitates coordination and data sharing.

I/O is assigned exclusively to each guest OS so existing native device drivers have direct access to real hardware.