pico- 《prefix》
1 one trillionth (1/1,000,000,000,000)
2 very small
3 square of [micro-]
Pico in the PicoKey, which is a prefix in the International System of Units (SI) denoting a factor of 1/1012, means 12 in the Keypad consisting of 12 keys,
and Key means keys in the Keypad.
Also 1/1012 represents very high utilization as it is small enough.
PicoKey™
is the Trade Mark of character input method, character input device, and character input program in small device using 12 keys.
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