Green Hills Software, Inc., is the technology leader in high performance compilers, software development tools and real-time operating systems (RTOS) for developers of embedded systems. An "embedded" system is one in which a microprocessor and associated components (e.g. memory) are incorporated into a product to aid the product in accomplishing difficult and complex tasks.

Examples of embedded systems include automobile engine controllers, anti-lock braking systems, digital cameras, computer disk drives, communication satellites, cellular phones, telephone switching systems, medical diagnostic equipment, video games, printers, set-top boxes, and various avionics systems for commercial and military aircraft. Products containing embedded microprocessors are being used in more and more areas of everyday life.

In 2008, the Green Hills INTEGRITY-178B RTOS was the first and only operating system to be certified by the NSA to EAL6+ High Robustness, the highest level of security ever achieved. Our INTEGRITY® and velOSity™ real-time operating systems, µ-velOSity™ microkernel, compilers, IPv6-ready TCP/IP networking stacks, GateD® Layer 2 switching and Layer 3 routing, MULTI® and AdaMULTI™ integrated development environments, DoubleCheck™ integrated static analyzer and TimeMachine™ tool suite offer a complete development solution that addresses both deeply embedded and high-reliability applications.

Green Hills Software was founded in 1982, is privately held, has been profitable since its inception. Green Hills Software has averaged nearly 30% per year revenue growth and is now the world's largest independent RTOS company. Green Hills Software is headquartered in Santa Barbara, CA, with European headquarters in the United Kingdom.