Microsoft Corporation
Logo from Aug 23, 2012 to present.

Logo from 1986 to Aug 23, 2012.

Logo from 1982 to 1986.

Logo from Dec, 1979 to 1981.

Logo from 1975 to 1975.

Company logos contributed by Sciere (505959), Xoleras (66865) and Pseudo_Intellectual (59603)