Thumb keyboard

Last updated December 04, 2025

A thumb keyboard, or a thumb board, is a type of keyboard commonly found on PDAs, mobile phones, and PDA phones which has a familiar layout to an ordinary keyboard, such as QWERTY.^[1] The inputting surface is usually relatively small and is intended for typing using thumbs, with the other fingers employed to hold the device.^[2]

Devices with thumb keyboards

BlackBerry
Some Hewlett Packard (HP) PDAs
- IPAQ 4350/4355/63XX series
HTC
Motorola
- Motorola MPx220
- Motorola Q
Nokia
Palm
- Palm Treo smartphones, with the exception of the Treo 180g
- Palm Tungsten C
Samsung
- Samsung Blackjack (SGH-i607)
- Samsung Galaxy Chat (GT-B5330)
Sony
- Some Sony CLIE PDAs
- Sony Ericsson Xperia X1
Wibrain: B1, B1L, B1H, I1
Xbox 360 Chatpad

References

↑ Siewiorek, Dan; Smailagic, Asim; Starner, Thad (2022-06-01). Application Design for Wearable Computing. Springer Nature. ISBN 978-3-031-02476-4.
↑ Sears, Andrew; Jacko, Julie A. (2009-03-02). Human-Computer Interaction Fundamentals. CRC Press. ISBN 978-1-4200-8882-3.

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[1] Siewiorek, Dan; Smailagic, Asim; Starner, Thad (2022-06-01). Application Design for Wearable Computing. Springer Nature. ISBN 978-3-031-02476-4.

[2] Sears, Andrew; Jacko, Julie A. (2009-03-02). Human-Computer Interaction Fundamentals. CRC Press. ISBN 978-1-4200-8882-3.

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