| 摘要 |
PURPOSE:To use an electronic file effectively by providing a means for recording the information satisfying the preset conditions out of various types of information stored in a storage means and retrieval data on a two-dimensional information medium. CONSTITUTION:A microcomputer MPU701 checks all retrieval data in an external memory device 6, selects the data to expire the term of validity, those which nobody retrieves since the date of the generation and the data with extremely little retrieval frequency, and stores them in a work memory 705. Since retrieval data are code information, they are converted into bit information by pattern information of a CG memory 703, and the retrieval data to be converted into the bit information are transferred to a picture memory 706. The retrieval data are outputted to a microfilm recorder not shown in the figure as picture information, and made to a microfilm.
|
