In software and data standards:

• Extensible Metadata Platform, Adobe's standard for processing and embedding metadata in various file formats
• Extended Module Player, an open-source tracker module player for Unix-like systems
• Deprecated HTML Tag that is similar to PRE but outputs tags enclosed within it instead of applying their traditional rendering.
• EXtreme Memory Profile

In gaming:

• eXpanded MultiPlayer (U2XMP), the multiplayer expansion to Unreal II
• Unreal Tournament: Expanded Multiplayer (UT:XMP), a total conversion of eXpanded MultiPlayer for Unreal Tournament 2004

In other contexts:

• Xanthosine monophosphate
• Short for Expanded metal