An information storage medium storing a knowledge information managing program, said program being for working a computer as:
- a knowledge database for storing knowledge data therein;
- knowledge judging means for selecting knowledge information by examining the knowledge information to be registered in said knowledge database for registering the selected knowledge information in said knowledge database;
- account managing means for registering the useful knowledge data extracted from said knowledge database in a knowledge account provided in an account database, said knowledge account having a fixed storage area;
- and
- knowledge opening means for opening the knowledge data stored in said knowledge database.