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

PDA PDA may refer to: Science and technology * Patron-driven acquisition, a mechanism for libraries to purchase books *Personal digital assistant, a mobile device * Photodiode array, a type of detector * Polydiacetylenes, a family of conducting poly ...

s, mobile phones, and PDA phones which has a familiar layout to an ordinary keyboard, such as QWERTY. The inputting surface is usually relatively small, and is intended for typing using the available thumbs, while holding the device.

Devices with Thumb Keyboards

* BlackBerry *Some Nokia phones including

Nokia 6800 series The Nokia 6800 series are a selection of Nokia Series 40 phones with an unusual fold-out QWERTY keyboard. This type of keyboard is also used in the more recent Nokia Series 60 Symbian-based Nokia E70. These phones were marketed as "messaging dev ...

* HTC TyTN,

HTC TyTN II The HTC TyTN II (also known as the HTC Kaiser, the HTC P4550, and the HTC 8925) is an Internet-enabled Windows Mobile Pocket PC smartphone designed and marketed by HTC Corporation of Taiwan. It has a tilting touchscreen with a right-side slide-ou ...

, HTC Touch Pro, HTC Touch Pro2 *Some Sony CLIE PDAs *Some

Hewlett Packard The Hewlett-Packard Company, commonly shortened to Hewlett-Packard ( ) or HP, was an American multinational information technology company headquartered in Palo Alto, California. HP developed and provided a wide variety of hardware components ...

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 Computer keyboard types