Thumb keyboard

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]

Slider mobile phone

Devices with thumb keyboards

• BlackBerry
• Some Hewlett Packard (HP) PDAs
  • IPAQ 4350/4355/63XX series
• HTC
  • HTC Apache
  • HTC Touch Pro
  • HTC Touch Pro2
  • HTC TyTN
  • HTC TyTN II
• Motorola
  • Motorola MPx220
  • Motorola Q
• Nokia
  • Nokia Communicator
  • Nokia Eseries
  • Nokia N97
• 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