iPAQ

It was first unveiled by Compaq in April 2000. iPAQ included PDA-devices, smartphones and GPS-navigators.

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).

When the "Assabet" board is combined with the "Neponset" companion processor board they provide support for 32 megabytes of SDRAM in addition to CompactFlash and PCMCIA slots along with an I2S or AC-Link serial audio bus, PS/2 mouse and trackpad interfaces, a USB host controller and 18 additional GPIO pins.

In February 2005, the iPAQ Mobile Messenger hw6500 series was introduced to selected media at the 3GSM conference in Cannes, France.

The 300 Series Travel Companion is not a PDA; marketed as a Personal Navigation Device, it is a handheld GPS unit operating on the Windows CE 5.0 core Operating System with a custom user interface.

Hewlett-Packard introduced a smartphone iPAQ Pocket PC that looks like a regular cell phone and has VoIP capability.

[7] In December 2009, HP released the iPAQ Glisten, running on Windows Mobile 6.5.

[15] On devices with added storage (primarily microdrives) there is a modified port of Debian called Intimate.

[16] In addition to a standard X11 desktop, Intimate also offered the Opie, GPE and Qtopia suites.

See Ångström distribution The hx2000 series and some later models are upgradeable to newer versions of Windows Mobile.

Other "cooked" (ready to run) roms have been provided by the group known as the xda-developers and are available for the hx2000 series, the hx4700 and others.

The same battery is used in the iPAQ jacket PN 173396-001 PCMCIA (PC port), which may also be upgraded to a 2200 mAh unit.

Compaq presumably upgraded the battery to cope with the faster CPU's power requirements.