WDM

WDM may refer to:

Science and technology

• Warm dark matter in cosmology
• Warm dense matter, a state of matter between solid and plasma
• Wavelength-division multiplexing, a signal transmission method
• wdm, the WINGs Display Manager on Unix
• Windows Driver Model, a framework for device drivers in Windows
• Wide Diesel Mixed, a series of Indian locomotives

Other uses

• West Des Moines, Iowa, United States, a city
• Western Development Museum of Saskatchewan
• World Development Movement, a British campaign for social justice
• Waking Down in Mutuality, an American "spiritual awakening" association
• Warith Deen Muhammad (Wallace D. Muhammad), a leader of the Nation of Islam
• WDM (Washington, D.C.), an early 1920s radio station