Green Hills Software provides a family of operating system products including the µ-velOSity real-time microkernel, the velOSity RTOS and the advanced INTEGRITY RTOS. This family of operating systems provides developers with a seamless migration path for future designs that grow in complexity and requirements. In addition, Green Hills Software has integrated the MULTI and AdaMULTI Integrated Development Environments and optimizing compilers with other leading embedded operating systems.

Green Hills Software's RTOS Products
The INTEGRITY® RTOS is a secure, maximum reliability, royalty-free Real-Time Operating System intended for use in mission critical embedded systems. The INTEGRITY Real-Time Operating System uses hardware memory protection to isolate and protect itself and user tasks from incorrect operation caused by accidental errors or malicious tampering.		The velOSity™ RTOS is small, fast and royalty-free—making it perfect for high volume, cost-sensitive, and deeply embedded applications. The velOSity RTOS is integrated with Green Hills Software’s best-in-class MULTI embedded software tools and provides a rich set of kernel services, device drivers, BSPs and middleware.
The INTEGRITY-178B RTOS is securely partitioned, making it ideal for demanding safety critical applications that contain multiple programs with different levels of safety criticality—all executing on a single processor.		The µ-velOSity real-time microkernel is the smallest of Green Hills Software’s family of royalty free operating systems. Its simple design and integration with the best in-class MULTI IDE make μ-velOSity both easy to learn and simple to use.