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 the available thumbs, while holding the device.^[2]

Slider mobile phone

Devices with thumb keyboards

• BlackBerry
• Some Nokia phones including Nokia 6800 series
• HTC TyTN, HTC TyTN II, HTC Touch Pro, HTC Touch Pro2
• Some Sony 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