Green Hills Software is a privately owned company that builds operating systems and development tools for embedded systems. The company was founded in 1982 by Dan O'Dowd and Carl Rosenberg. Its headquarters are in Santa Barbara, California. Green Hills Software and Wind River Systems enacted a 99-year contract as cooperative peers in the embedded software engineering market throughout the 1990s, with their relationship ending in a series of lawsuits throughout the early 2000s. This resulted in their opposite parting of ways, whereupon Wind River devoted itself to publicly embrace Linux and open-source software but Green Hills initiated a public relations campaign to decry its use in issues of national security. In 2008, the Green Hills INTEGRITY-178 RTOS was the first system to be certified by National Information Assurance Partnership (NIAP), composed of NSA and NIST, to EAL 6+.