With computers, one size most certainly does not fit all, which is why a few companies, such as NEC, keep cranking out handheld PCs. The NEC MobilePro 900 ($900 street) is the latest and arguably one of the best of the clamshell "tweener" products—bigger and more versatile than a PDA, but smaller and more portable than even the smallest notebook PC.
Weighing in at just 1.8 pounds, the MobilePro 900 travels easily in a shoulder bag. At 1.2 by 9.7 by 5.1 inches (HWD), though, it wont fit neatly in a pocket. Still, the size is just right for business users who need custom business applications combined with embedded pocket versions of Microsoft Word, Excel, PowerPoint, Outlook, and Internet Explorer. A professional working in healthcare, field service operations, sales, or inventory needs a computer with a real keyboard and the known Windows environment (here, Microsoft Windows CE). The 17.5-mm key pitch yields a keyboard thats 92 percent the size of a desktops. The touch-screen display is an 8.1-inch half-VGA (640-by-240).
For the complete details, read the PC Magazine article.