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Chapter 1. Meet Your Treo > Getting to Know the Palm OS and Core Treo Applicati...

Getting to Know the Palm OS and Core Treo Applications

Note

One other subtle but important design difference between the Treo 600 and Treo 650 involves the keyboard. The keys on the Treo 650 are slightly larger and flatter, which makes typing on the 650 considerably easier than on the 600. Additionally, the 650 adds the Phone/Send (green) and Power/End (red) buttons, which help make the 650 feel more like a true mobile phone.


The Palm OS has evolved quite a bit over the years and actually comes in several forms. The Palm OS version found on current Treo devices, version 5.x, is known as Palm Garnet and was rewritten from the ground up to support the newer generation of Palm devices. Palm OS 5 is unique in that it specifically targets Advanced Risc Machines (ARM)–based microprocessors, such as those made by Intel, Motorola, and Texas Instruments. Interestingly enough, ARM microprocessors are also used on Pocket PC devices, many of which are direct competitors of Treo devices.


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