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Palm Treo

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Treo devices

A total of nineteen Treo models were released, listed below in reverse chronological order. Treos through the 680 series used Palm OS. Beginning with the 700 series, Treos ran both Palm OS and Windows Mobile. The Treo 700w was the first of the 700 line, and the first Treo to use Windows Mobile. On August 19, 2008, Palm released the last Treo device, the Treo Pro on GSM. The Treo Pro on CDMA began sales in March 2009.

Officially announced models:

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