14. A text search system set forth in claim 9, characterized in that said filtering means includes leading concatenate character flag storage means for setting a value indicating "ON" in slots corresponding to concatenate character codes of a leading portion, referred to as leading concatenate character code, of the search term designated previously while setting a value indicating "OFF" in slots corresponding to the other character codes, and trailing concatenate character flag storage means for setting a value indicating "ON" in slots corresponding to other concatenate character codes, referred to as trailing concatenate character codes, than said leading concatenate character codes contained in said search term while setting a value indicating "OFF" in a slot corresponding to the other concatenate character codes; said system further comprising output select means for referencing said leading concatenate character flag storage means and said trailing concatenate character flag storage means in correspondence to n concatenate character codes inputted from said character string storage means sequentially, to thereby output said concatenate character codes to said character string matching means only when the relevant leading concatenate character flag as read out is "ON" while when said leading character flag once assumed "ON", said output select means outputs the input character codes to said character string matching means only when either the relevant leading character flag or trailing character flag is "ON" before both of said leading character flag and said trailing character flag become "OFF".
9. A text search system for deciding en bloc whether or not a plurality of user-designated search terms exist in a text composed of characters expressed in the form of character codes, characterized in that said system comprises: character string storage means for storing a text; concatenate filtering means for fetching character codes sequentially from the text read out from said character string storage means to thereby make decision as to whether or not n, where n represents an integer not smaller than 2, character codes as fetched are included in said search terms as a concatenate character string and output said n concatenate character codes only when said codes are included in said search terms; character string matching means for deciding by matching en bloc whether or not said search terms exist in a compound character string composed of a chain of the character strings each constituted by n concatenate character codes outputted from said concatenate filtering means; and synchronizing means provided between said concatenate filtering means and said character string matching means for buffering differences in processing speed while transferring data from said concatenate filtering means to said character string matching means.