One screen, two thumbs. Jackito is the first PDA screen that is 100% Fingertouch-sensitive. While holding Jackito in your hands, you can easily move both your thumbs, either
separately or together. This lets you operate the Touchscreen as fast as your brain thinks.

Jackito’s screen is wider than it is high. You hold Jackito in both hands and in landscape mode (like your eyes). You can then comfortably touch its screen by slightly moving both thumbs. There are no physical keys to press.
The topology of the screen layout (left, right, top, bottom) have specific functions and meanings (plus, minus, info, etc).

Pictures and demo here.