XR or Xr may refer to:
The XRCO Awards are given by the American X-Rated Critics Organization annually to people working in adult entertainment and it is the only adult industry awards show reserved exclusively for industry members.
The XrossMediaBar (pronounced cross-media bar and officially abbreviated as XMB) is a graphical user interface developed by Sony Interactive Entertainment.
XRDS (eXtensible Resource Descriptor Sequence) is an XML format for discovery of metadata about a web resource – in particular discovery of services associated with the resource, a process known as service discovery.
DNA repair protein XRCC1 also known as X-ray repair cross-complementing protein 1 is a protein that in humans is encoded by the XRCC1 gene.
In software development XRX is a web application architecture based on XForms, REST and XQuery. XRX applications store data on both the web client and on the web server in XML format and do not require a translation between data formats.
DNA repair protein XRCC3 is a protein that in humans is encoded by the XRCC3 gene.
DNA repair protein XRCC2 is a protein that in humans is encoded by the XRCC2 gene.
XRumer is a forum spamming software marketed as search engine optimization program, created by BotmasterLabs, that is able to register and post to forums (forum spam) with the aim of boosting search engine rankings.
XRDS, formerly Crossroads, is the flagship academic magazine for student members of the Association for Computing Machinery or ACM.