A financial analyst for Lehman Bros. Tapping deftly like a touch-typist but with only his thumbs, To also uses the gadget while riding the bus to work or traveling on business. In a new twist on the phrase "all thumbs," a growing number of device makers that used to rely only on touch screens or screen strokes are now adding thumb-operated keyboards to their handhelds. The trend reflects a growing demand for more efficient, yet portable ways of entering data. Thumb keyboards may, if users aren't careful, lead to some serious thumb strain. Many portable, full-size keyboards are already sold as accessories.
Cat | Thumbs for Excavators and Backhoes | Caterpillar