A thumb keyboard, or a thumb board, is a type of

keyboard Keyboard may refer to: Text input * Keyboard, part of a typewriter * Computer keyboard ** Keyboard layout, the software control of computer keyboards and their mapping ** Keyboard technology, computer keyboard hardware and firmware Music * Musi ...

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 ...

mobile phone A mobile phone, cellular phone, cell phone, cellphone, handphone, hand phone or pocket phone, sometimes shortened to simply mobile, cell, or just phone, is a portable telephone that can make and receive calls over a radio frequency link whil ...

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 left letter row of the keyboard ( ). The QWERTY design is based on a layout created f ...

. 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 and speech recognition. Text can b ...

using the available thumbs, while holding the device.

Devices with Thumb Keyboards

BlackBerry The blackberry is an edible fruit produced by many species in the genus ''Rubus'' in the family Rosaceae, hybrids among these species within the subgenus ''Rubus'', and hybrids between the subgenera ''Rubus'' and ''Idaeobatus''. The taxonomy of ...

*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 The HTC TyTN (also known as the HTC Hermes and the HTC P4500) is an Internet-enabled Windows Mobile Pocket PC PDA designed and marketed by High Tech Computer Corporation of Taiwan. It has a touchscreen with a left-side slide-out QWERTY keyboar ...

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 The HTC Touch Pro (also known as the HTC Raphael, AT&T Fuze, XDA Serra, or MDA Vario IV) is a smart phone from the ''Touch'' series of Internet-enabled Windows Mobile Pocket PC smartphones designed and marketed by HTC Corporation of Taiwan. It i ...

HTC Touch Pro2 The HTC Touch Pro2 (also known as the AT&T Tilt 2, HTC Tytn III; codename: HTC Rhodium, HTC Barium, HTC Tungsten, HTC Fortress) is a slate smartphone, part of the Touch series of Internet-enabled, Windows Mobile, Pocket PC smartphones designed and ...

*Some

Sony , commonly stylized as SONY, is a Japanese multinational conglomerate corporation headquartered in Minato, Tokyo, Japan. As a major technology company, it operates as one of the world's largest manufacturers of consumer and professional ...

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 Motorola, Inc. () was an American multinational telecommunications company based in Schaumburg, Illinois, United States. After having lost $4.3 billion from 2007 to 2009, the company split into two independent public companies, Motorola ...

Palm Treo The Palm Treo (stylized as Trēo) is a discontinued line of smartphones originally developed by Handspring, which was bought by Palm, Inc. They were then manufactured and maintained by Palm, Inc. Treos had a number of integrated features such as ...

smartphones, with the exception of the

Treo 180g The Treo 180g is a dual-band GSM smartphone made by Handspring. Released in 2002, it was the third device in the Treo family. The 180g is essentially the same as its predecessor, the Treo 180, except that it uses Palm's proprietary Graffiti handw ...

Palm Palm most commonly refers to: * Palm of the hand, the central region of the front of the hand * Palm plants, of family Arecaceae **List of Arecaceae genera * Several other plants known as "palm" Palm or Palms may also refer to: Music * Palm (ba ...

Tungsten C *Samsung products including Samsung Blackjack (SGH-i607) *

Motorola Q The Motorola Q is a Windows Mobile smartphone first announced in the Summer of 2005 as a thin device with similar styling to Motorola's immensely popular RAZR. Motorola in a partnership with Verizon Wireless released the Q on May 31, 2006. A versi ...

* Wibrain: B1, B1L, B1H, I1 Computer keyboard types