| 摘要 |
Keys which are used in a keyboard of a miniaturized data processing device include an upper surface which is provided with a downwardly-extending wall running transversely to the movement of the finger when operating the keys. The downwardly-extending wall, which is formed, for example, by a groove disposed in the upper surface, serves as a support for the tip of a user's fingernail when operating the keys. Such keys make possible an accurate operation even if the keys are disposed closely side by side in a miniaturized key board and the fingernail is fashionably long.
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