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