| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that an input is hardly performed in a plurality of personal computer main body parts by only one keyboard and one mouse. SOLUTION: An electrooptical converting unit 7 is arranged for the common keyboard 5 and mouse 6. The electrooptical converting units 8, 9 and 10 by the same standard are adjacently disposed and respectively connected to the personal computer main bodies 1, 2 and 3. A light shielding body 18 is arranged to selectively shield the light input passages of the electrooptical converting units 8, 9 and 10.
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