From Sega Retro
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The Lockheed Martin Company is an American global aerospace, defense, security, and advanced technology company formed in 1995 from the merger of Lockheed Corporation and Martin Marietta. It's military products have featured in F-16 Fighter, and one of its internal subsidiaries, Martin Marietta, sponsored the Model 2 arcade game, Desert Tank.
Lockheed Martin worked closely with Sega to produce components for the Sega Model 2 (under GE Aerospace, which became part of Martin Marietta in 1993) and Sega Model 3 arcade system boards. The company was once at work producing a "Saturn 2" for Sega, though the contract was lated dropped in favour of 3dfx, which was in turn dropped in favour of PowerVR, eventually coming together as the Sega Dreamcast.
Contrary to popular opinion, Lockheed Martin was not involved with the development of the Sega Model 1, but it was developed internally at Sega, before Lockheed Martin became involved with the development of the Sega Model 2, according to Real3D's Jon Lenyo (and former Lockheed Martin employee) in 1998.
In 1995, a spin-off company from Lockheed Martin, Real3D, was formed by the team that worked on the Sega Model 2 rendering chip. By late 1995 or early 1996, Real3D developed the Real3D Pro-1000, a fully featured GPU with T&L capabilities, used in the Sega Model 3. Along with their Sega partnership, Real3D also had a partnership with Mitsubishi, which provided the ALU and graphics memory used by the Real3D Pro-1000.