WM Wm, wm, or variants may refer to:
- 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 Mutually, a former American savings bank (former MYSE 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
Computing
- Window manager, software that controls the placement of windows on the screen
- 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
- 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