WMI may refer to: Organisations Washington Mutual Inc, a former savings bank holding company Waste Management, Inc (former NYSE symbol), a provider of waste management services Water Missions International, an engineering organization providing safe water and sanitation following natural disasters West Michigan Railroad (reporting mark) Wildlife Management Institute, of which Ira Noel Gabrielson was a former president World Medicine Institute, located in Honolulu, Hawaii, United States, offering degrees in acupuncture and oriental medicine Other Windows Management Instrumentation, in Microsoft Windows operating systems, a set of extensions to the Windows Driver Model WMI (window manager), old name for wmii, the Window Manager Improved for the X Window System World manufacturer identifier, in a Vehicle Identification Number denoting the manufacturer of the vehicle and the region in which it was made Working Memory Index, part of the Wechsler Intelligence Scale for Children Warsaw Modlin Airport (IATA code), near Warsaw, Poland fr:WMI