3X or 3-X may refer to:bajjil
- 3X Krazy, American hip-hop group
- Yeah 3x, single by Chris Brown
- Windows 3.x
- ArcView 3.x
- Windows NT 3.x
- IBM System/3X
- 3X, IATA code for Japan Air Commuter
- 3X or XXX, a reference to the municipal flag of Amsterdam*
HTV-3X, see DARPA Falcon Project
- Look 3X; see Look Look Look
- Alberta Highway 3X; see List of Alberta provincial highways
- Saab 9-3X, a model of Saab 9-3
- SEV-3X, a model of Seversky SEV-3
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