The iPAQ is a discontinued line of Pocket PC devices produced from 2000 until 2010. It was first unveiled by Compaq in April 2000. iPAQ included PDA-devices, smartphones and GPS-navigators. A substantial number of devices were outsourced from Taiwanese HTC corporation.
Following Hewlett-Packard (HP)'s acquisition of Compaq, the product had been marketed by HP. The devices use a Windows Mobile interface. In addition to this, there are several Linux distributions that also operate on some of these devices. Earlier units were modular. Sleeve accessories were released called "jackets", which slide around the unit and add functionality such as a card reader, wireless networking, GPS, and extra batteries. Later versions of iPAQs have most of these features integrated into the base device itself, some including GPRS mobile telephony (SIM card slot and radio).