| 摘要 |
PROBLEM TO BE SOLVED: To provide an electronic notebook capable of using an external recording medium which has a large capacity, the unit price of which is inexpensive and which comparatively dispenses with taking care of handling. SOLUTION: The driving part and the control part of a magneto-optical disk are provided at the electronic notebook to provide a means by which the magneto-optical disk can be used as an external recording medium.
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