XTP may refer to: Extreme Transaction Processing, an exceptionally demanding form of transaction processing Xanthosine triphosphate, a nucleotide Xpress Transport Protocol, a transport layer protocol XML Template Pages, enhances JSP pages with stylesheets Xtreme Toolkit Professional, enhanced commercial toolkit for GUI development with MFC by Codejock Software. Extreme Terminal Performance branded XTP, a self-defense bullet type produced by Hornady Manufacturing Company.