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United States v. Microsoft Corp.

United States Court of Appeals for the District of Columbia Circuit
253 F.3d 34 (D.C. Cir. 2001)


Microsoft Corporation (Microsoft) (defendant) was a leading seller of operating-system software and related software products. Microsoft began a sales practice of bundling its web-browsing software, Internet Explorer, with its operating-system software, Windows 95 or 98. At the time, Microsoft enjoyed market power in the market for operating-system software but faced competition in the market for web-browsing software. The United States (plaintiff) brought a complaint against Microsoft, arguing that Microsoft’s bundling practice was an unlawful tying arrangement. The district court held in favor of the government and found Microsoft’s bundling practice to constitute a per se violation of antitrust law. Microsoft appealed the decision, arguing that the bundling practice should not have been subject to a per se analysis.

Rule of Law


Holding and Reasoning (Per curiam)

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