Exhibits At the Museum

This Day in History

Today: September 16, 2014

March 17, 1988

Apple Sues Microsoft for Copyright Infringement

Apple Computer sues Microsoft for copyright infringement over the graphical user interface (GUI) of its operating system. After Apple developed the highly successful Macintosh GUI in 1984, Microsoft released their Windows operating system, which had some similarities in its GUI’s look and feel. Under terms of a confidential agreement signed between the two companies in 1985, Microsoft consented to acknowledging that their GUI was derived from that of the Macintosh. In return, Apple gave Microsoft license to use the design in its software. A judge eventually decided Apple had only limited rights to the design.