| 摘要 |
A computer peripheral device comprising a hand-sized mobile enclosure known as a "mouse", and having a plurality of finger- or hand-operated keys which may be actuated together with the motion of the enclosure to translate positional information into coordinates as input to a computer system, is characterised by the additional facility for inputting symbols such as alpha-numerics by suitably coded actuation of the same keys. For example, in the position mode for sending data in a digitising stream, the "mouse" has ball 4 in contact with surface 2; if tilted onto heel 3, string mode is entered so that keys 6 send signals to the symbol stream. An additional keypad may be accommodated in the other hand. Applications include computer-aided design and drafting, video graphics, word processing and television subtitling. <IMAGE>
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