IDM may refer to:

• Identity management, the management of the identity life cycle of an entity
  • Novell Identity Manager software, now called NetIQ Identity Manager
• Integrated data management
• Integrated document management
• Integrated device manufacturer, a type of semiconductor company which designs, manufactures, and sells integrated circuit products
• Integrated Direct Metering, a real-time TTL metering method for ambient and flashlight employed by the Pentax LX
• Intelligent device management, a type of enterprise software applications
• Intelligent driver model, a microscopic traffic flow model
• Internet Download Manager, a closed source software download manager
• Infant of a diabetic mother, in medicine; for example see Respiratory disease#Neonatal diseases

• IDM (ISP), also known as IncoNet-Data Management S.A.L., an internet service provider
• IDM Computer Solutions, creators of the UltraEdit text editor
• Impact Direct Ministries, a non-profit organization
• Institute for Disease Modeling, epidemiological research organization in Bellevue, Washington

• Intelligent dance music, a subgenre of electronic music
• Industrial dance music, a fusion of industrial and electronic dance music

• Intelligent design movement, a religious campaign promoting the pseudoscientific idea of intelligent design