1. An information storage/retrieval system having an input means, a storage means including a first and second memory means and a processing means coupled to said input means and said storage means wherein: said first memory means stores therein a plurality of main records, each main record containing first partial word data comprising a word stem, a derivative pattern code provided for each individual word stem which represents a family of affixes of the word stem with each derivative pattern code being usable with a plurality of possible word stems, and a number of information pieces; said second memory stores therein a plurality of auxiliary records, each auxiliary record containing a single derivative pattern code and a plurality of second partial word data associated with said single derivative pattern code, each of said second partial word data in each of said auxiliary records including supplemental data which constitutes a word when combined with first parallel word data in any one of the main records in said first memory which contain a same derivative pattern code as the derivative pattern code contained in the associated auxiliary record; and said information pieces in each of said main records including common data and a plurality of proper data, common data in any one of said main records being indicative of location of one of said plurality of second partial word data in that one of said auxiliary records which contains a same derivative pattern code as said one main record contains, the second partial word data indicated by said common data being usable with the first partial word data in said one main record to produce a normalized keyword contributing to representation of each of the proper data in said one main record.
1. An information storage/retrieval system having an input means, a storage means including a first and second memory means and a processing means coupled to said input means and said storage means wherein: said first memory means stores therein a plurality of main records, each main record containing first partial word data comprising a word stem, a derivative pattern code provided for each individual word stem which represents a family of affixes of the word stem with each derivative pattern code being usable with a plurality of possible word stems, and a number of information pieces; said second memory stores therein a plurality of auxiliary records, each auxiliary record containing a single derivative pattern code and a plurality of second partial word data associated with said single derivative pattern code, each of said second partial word data in each of said auxiliary records including supplemental data which constitutes a word when combined with first parallel word data in any one of the main records in said first memory which contain a same derivative pattern code as the derivative pattern code contained in the associated auxiliary record; and said information pieces in each of said main records including common data and a plurality of proper data, common data in any one of said main records being indicative of location of one of said plurality of second partial word data in that one of said auxiliary records which contains a same derivative pattern code as said one main record contains, the second partial word data indicated by said common data being usable with the first partial word data in said one main record to produce a normalized keyword contributing to representation of each of the proper data in said one main record. 2. A system according to claim 1, in which the system further comprises a third memory means for storing therein additional data concerning said proper data in said main records and said normalized keywords.