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A Buyer's Guide To Ultramobile PCs: Page 5 of 5

Its smallest business-minded laptop runs Apple's Mac OS X Tiger and comes in two sizes: 15.4 inches and 17 inches. (You could get a MacBook with a 13-inch screen.) There's a lot to love about that 17-inch screen when dealing with graphics-rich applications, but the more portable 15.4-inch screen is a more practical, plane-friendly option for travelers. The 5-pound weight includes a built-in battery and optical drive.

The MacBook Pro comes with several features for businesspeople to appreciate, including Intel's latest mobile processor, Core 2 Duo, a built-in camera for videoconferencing, and wireless connectivity based on the 802.11n draft standard, which offers speeds up to five times faster and up to two times the range compared with the 802.11g standard of previous models.

The MacBook Pro's battery life also is shorter than most ultraportable laptops--only up to six hours. It's replaceable, but you'll have to travel with two.