1. Computer related

X10 may refer to:

• North American X-10, an unmanned technology demonstrator for advanced missile technologies
• SL X10, a Swedish suburban train
• X10 industry standard, communication over wired power line or wireless used for home automation
  • X10 Wireless Technology, a vendor of home automation products
• X-10, a code name for the Metallurgical Project
  • X-10 Graphite Reactor, one of the world's first nuclear reactors
• Sony Ericsson Xperia X10, a smartphone using the Android operating system
• X10 (video game), a video game by Warthog Games Limited
• X Ten, a gene-sequencing machine in the HiSeq series produced by the San Diego-based biotech firm Illumina

Computer related

• X10 programming language
• Microsoft X10 Event, a Microsoft conference demonstrating Xbox 360 games/technologies for 2010 on 11 February 2010
• X Window System, 10th protocol version from 1986 to 1988

• Saint Just (band)
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• Saint-Just-et-Vacquières
• Saint-Just-Ibarre
• Saint-Justin
• Saint Justin
• Saint Justina of Padua
• Saint Justinian
• Saint Justinian of Brittany
• Saint Justinian of Ramsey Island
• Saint Justin of Chieti
• Saint-Justin, Quebec
• Saint Justin School
• Saint Justin's Church, Frankfurt-Höchst
• Saint-Just-Saint-Rambert
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• Saint-Juéry, Lozère
• Saint Jérôme