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Devices: Treo 650, Treo 680, Treo 700p, Treo 755p, T|X, etc.
!http://www.palm.com/us/images/products/smartphones/Front_Treo755.gif! 
Palm OS devices are popular at MIT. However, the future of the OS is uncertain as Palm OS had been virtually at a stand-still since 2004 with the exception of minor updates. Most industry experts believe that the Palm OS will phase out over the next couple of years.
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