Project PDA

Handspring stopped producing the Visor line, and replaced it with the Handspring Treo, a more "communication centric" line of handhelds, most of which were integrated with cellular phones and included built-in keyboards for enhanced e-mail and SMS functionality. To keep the models slim, Handspring gave Springboard up in the Treo series.

Treo 90

The Treo 90 was the only Treo model to be produced without an integrated cellular phone. It's form factor was similar to, but slightly smaller than, other early treo models. At the time of its release, it was the smallest Palm OS device on the market.

Treo 180 / 180g

The Treo 180 and 180g were monochrome devices. The 180 had a built-in keyboard, and the 180g had no keyboard but included the Graffiti hand-writing recognizer. Both were GSM phones. The 180g was quickly pulled off of the market due to poor sales.

Treo 270 / Treo 300

The Treo 270 was a GSM model and the Treo 300 was a CDMA model which was released by SprintPCS.

Treo 600

Treo 600 is now known as palmOne Treo 600. At the time the GSM version was one of the few quad-band phones available in the United States.

Treo 650

Treo 650 features many improvements over the Treo 600. These include Bluetooth wireless connectivity, an improved keyboard, an enhanced digital camera, a removable battery, and an enhanced 320x320 display. The 650 is available throughout the US and is supported by multiple wireless carriers.

Treo 700w

The Treo 700w departs from the Treo standard of using Palm OS, instead opting for the Windows Mobile 5.0 operating system. The Treo 700w is a CDMA model which has been released by Verizon Wireless. Unfortunately, there is one drawback from the Treo 650: the resolution has been lowered to 240x240, which is almost half the number of the pixels of the Treo 650. The Treo 700w is also the first Treo to support EV-DO, a high-speed wireless data technology.

Treo 700p

The Treo 700p is a smartphone announced on May 15, 2006. In this model Palm has returned to the Palm OS, after the Treo 700w, and has revamped the Treo product line for the first time since the Treo 650. This is the first Palm OS Treo model to feature high-speed cellular network support, and is also the first Treo model to support Bluetooth 1.2 and consequently peripheral devices such as wireless headsets.