A thumb keyboard, or a thumb board, is a type of keyboard commonly found on PDAs,

mobile phone A mobile phone or cell phone is a portable telephone that allows users to make and receive calls over a radio frequency link while moving within a designated telephone service area, unlike fixed-location phones ( landline phones). This rad ...

s, and PDA phones which has a familiar layout to an ordinary keyboard, such as

QWERTY QWERTY ( ) is a keyboard layout for Latin-script alphabets. The name comes from the order of the first six Computer keyboard keys#Types, keys on the top letter row of the keyboard: . The QWERTY design is based on a layout included in the Sh ...

. The inputting surface is usually relatively small and is intended for

typing Typing is the process of writing or inputting text by pressing keys on a typewriter, computer keyboard, mobile phone, or calculator. It can be distinguished from other means of text input, such as handwriting recognition, handwriting and speech ...

using the available thumbs, while holding the device.

Devices with thumb keyboards

BlackBerry BlackBerry is a discontinued brand of handheld devices and related mobile services, originally developed and maintained by the Canadian company Research In Motion (RIM, later known as BlackBerry Limited) until 2016. The first BlackBerry device ...

*Some Nokia phones including Nokia 6800 series * HTC TyTN, HTC TyTN II, HTC Touch Pro, HTC Touch Pro2 *Some

Sony is a Japanese multinational conglomerate (company), conglomerate headquartered at Sony City in Minato, Tokyo, Japan. The Sony Group encompasses various businesses, including Sony Corporation (electronics), Sony Semiconductor Solutions (i ...

CLIE PDAs *Some Hewlett Packard PDAs (HP iPaq 4350/4355/63XX series) *Microsoft Xbox 360 Controller "Chatpad" * Motorola MPx220 * Palm Treo smartphones, with the exception of the Treo 180g * Palm Tungsten C *Samsung products including Samsung Blackjack (SGH-i607) * Motorola Q * Wibrain: B1, B1L, B1H, I1

References

{{Reflist Computer keyboard types