If all you need is an address book, appointments diary, memo pad and calculator, an electronic personal organiser will do the trick, but if you're after a portable extension to your desktop PC, it's worth paying more for one of these mobile computerss. By attaching a modem and a phone line, you can send and receive emails, and search for and download software from the internet. And, of course, you can transfer information between your mobile and desktop PCs. The other four are handhelds, which have a separate small keyboard attached by a hinge to the display section, like a mini-laptop. Size is given as height x width x depth.
Battery life is based on manufacturers' estimates of average use.
For this price, expect at least 16Mb of memory and word processing and spreadsheet options. Your choice is between lightweight, compact palmtops and the convenience of a handheld with its hinged keyboard. Microsoft Windows CE operating system. Microsoft Reader and Money, audio and games. Microsoft Word, Excel, Pocket Streets.