WM, Wm, wm, or variants may refer to:
Businesses and organizations Walmart, an American retailing chain Walter Mart, a group of shopping malls in the Philippines WarnerMedia, formerly Time Warner, an American mass media conglomerate Washington Mutual, a former American savings bank (former NYSE stock symbol WM) Waste Management (corporation), a North American garbage company (former NYSE stock symbol WM), doing business as WM Western Maryland Railway, a former railway in the United States Winair (Windward Islands Airways) (IATA airline code WM) WM Entertainment, a South Korean entertainment company
Military Waterloo Medal, a medal awarded to British soldiers who fought in the Waterloo campaign in 1815 Wachtmeister, a military rank in Austria and Switzerland "Wehrmacht Marine", on license plates of the German Navy in World War II Woman Marine, a female member of the United States Marine Corps
Science and technology Computing Window manager, software that controls the placement of windows on the screen X window manager, a component in the X Window System Window Maker, a window manager for the X Window System Windows Media, a multimedia framework for media creation and distribution for Microsoft Windows Windows Messenger, a piece of software included in the Microsoft Windows XP operating system Windows Mobile, an operating system for Pocket PCs
Other uses in science and technology Waldenström's macroglobulinemia, a rare form of blood cancer Wave method, a model used in fluid dynamics White matter, a type of brain tissue Working memory, a part of the short-term memory
Sport Die Weltmeisterschaft – German for the FIFA World Cup, informally referred to as die WM WM formation, a formation in association football, so called because it spells out the letters when viewed from above WrestleMania, a professional wrestling pay-per-view event
Other uses Wayback Machine William (name), sometimes abbreviated Wm. College of William & Mary, a public research university in Virginia, US Worshipful Master, the head of a lodge in freemasonry William McKinley, 25th president of the United States