Manufacturer's Description
Lenovo ThinkPad X61 Tablet PC
ThinkPad X Series Tablet models have the full functionality of other X Series notebooks plus a unique swivel hinge that allows the screen to rotate 180 degrees for use as a Tablet PC. The tablet functionality allows you to do things such as take handwritten notes with the Tablet Digitizer Pen or even use your finger to interact via touch screen on select models. Available Intel Centrino Pro processor technology on the ThinkPad X61 Tablet delivers hardware-based security and enhanced manageability, along with exceptional performance and outstanding mobility. And like all X Series notebooks, the X61 Tablet is ultraportable and offers extremely long battery life.

Review:
Lenovo ThinkPad X61t (Tablet)
This tablet version of the X61 adds a swivel touch screen to double as an easy-to-hold note-taking device.
A tidy little 4.4-pound unit, the tablet version of Lenovo's ThinkPad X61 ultraportable lacks an integrated optical drive, but it has a great design, long battery life, and an easy-on, easy-off docking station. At $2333 (as of August 15, 2007), however, it's expensive.
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