MII (cost-estimating-software), developed for the United States Army Corps of Engineers by Project Time & Cost, Inc.

Ministry of Information Industry, a ministry of the State Council of the People's Republic of China

Major Industry Identifier, part of ISO 7812

Maritime Institute of Ireland, who operate the National Maritime Museum of Ireland

Michigan Interactive Investments, a University of Michigan student-run finance and investment organization

A Mii is a personalized digital avatar for the Wii video game console by Nintendo. MII or Mii may also refer to:

1002, the year or the number in Roman numerals

Media Independent Interface, in Ethernet hardware

Mii (Jungle de Ikou!), the busty Goddess of Fertility in Jungle de Ikou! (a fanservice anime)

MII (videocassette format), a professional videotape format developed by Panasonic

MII (Cyrix CPU), an x86 architecture CPU by Cyrix