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Portable computing 20 years ago wasn't for weaklings. The $1,500 Kaypro IIx--dubbed a "luggable"--weighed 25 pounds and had to be plugged in. But with a detachable keyboard, a crisp 9-Inch screen, and dual 5.25-inch floppy drives, it held its own back then, running a simple word processor.
Today, $1,500 buys 6 pounds of svelte laptop that plays DVDs, burns CDs, handles office work, and runs several hours on a rechargeable ...