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.Once every calendar year, XRCO members are asked to submit their own nominations.
The XrossMediaBar (pronounced "CrossMediaBar" or "cross-media bar" and officially abbreviated as XMB) is a graphical user interface developed by Sony Computer Entertainment.
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.
5'-3' exoribonuclease 1 (Xrn1) is a protein that in humans is encoded by the XRN1 gene. Xrn1 hydrolyses RNA in the 5’ to 3’ direction.