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The company began selling flight simulators for several computer platforms, including the 8080, Altair 8800 and IMSAI 8080.
In 1979 sub LOGIC released FS1 Flight Simulator for the Apple II.
It was an early product in the Microsoft application portfolio and differed significantly from Microsoft's other software, which was largely business-oriented.
In 2009 Lockheed Martin announced that they had negotiated with Microsoft to purchase the intellectual property (including source code) for the Microsoft ESP (Enterprise Simulation Platform) product.
Microsoft ESP is the commercial-use version of Flight Simulator X SP2.
Microsoft Flight Simulator has a wide selection of upgrades and add-ons, both free and commercial, official and fan-made.
On January 22, 2009, it was reported that the development team was heavily affected by Microsoft's ongoing job cuts, with indications that the entire Microsoft Flight Simulator team had been laid off.