Disk storage can be a scarce commodity on a laptop. While desktop PCs have hard disks holding up to a billion bytes, laptop disks hold only a fifth as much. With some bulky Windows programs and a few slide shows, a 200-megabyte disk can fill up quickly.
The Pereos digital audio tape drive from Datasonix Corp. (800 328-2779) can help ease the crunch. The 10-ounce, $649 device can carry some 1,200 megabytes of information on a $29 tape cassette about the size of a sugar cube and half as thick. The device, which connects to the printer port of any Windows computer, is powered by two AA batteries and can shuttle data on and off of your hard drive at 5 to 10 megabytes per minute.