PBX

PBX may refer to:


 * Pakubuwono X, the tenth Susuhunan of Surakarta in Java, Indonesia
 * Polymer-bonded explosive
 * Pre-B-cell leukemia homeobox
 * Private branch exchange, a telephone exchange that serves a particular business or office
 * PBX Funicular Intaglio Zone, a 2012 album by John Frusciante
 * PBX, a rewrite of the Project Builder IDE for Mac OS X systems, now known as Xcode
 * PhotoBox, a digital photo printing service