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 "CrossMediaBar" or "cross-media bar" and officially abbreviated as XMB) is a graphical user interface developed by Sony Interactive 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.