| 摘要 |
An indexing system for information stored in a library of CD-ROMs selectively readable at a plurality of computer terminals comprises a hard drive storage device at each of the computer terminals including a master index of selectable information contained on each CD-ROM; a second index for information stored on all of the CD-ROMs in the library, the second index for each CD-ROM being substantially complete at the time of storage of information on that CD-ROM with respect to information on all other CD-ROMs existing at that time. A comparator compares the master index and the second index on any selected one of the CD-ROMs in the library to determine if the information matches. If the information does not match, the hard drive storage device of the selected computer terminal is updated to reflect the additional information in the CD-ROM so that the master index on the hard drive corresponds to the information on the second index of the selected CD-ROM. The information in the master index is preferably keywords relating to specific groups of information on the CD-ROMs and the location of that information thereon in order to facilitate selective access to that information. |
