Casio Cassiopeia E-100 3.8" 240 x 320pixels Touchscreen 255g Silver handheld mobile computer

Pocket PC E-100 Cassiopeia Casio bills the E-100 as "the world's smallest multimedia color Palm-size PC." That claim overdoes it a bit, since the Casio is not significantly smaller than the other devices in this group. But the statement does capture the essence of what distinguishes the E-100 from its competitors: a stunningly bright TFT color display that supports 65,000 colors, and a fast 131MHz processor.

Although the boxy Casio is not as ergonomically contoured as the other units, it is still acceptably comfortable to hold and use. It also has more external buttons than the other units; the buttons are recessed to prevent accidental turn-on. The Cassiopeia also has a unique disk-shaped control that provides up-down-left-right inputs.