1. A digital data processing apparatus for storing digitally encoded linguistic information, said apparatus comprising A. input means for accepting a signal representative of linguistic expression, B. database storage means for storing a linguistic expression database, said database storage means including master lexicon storage means for storing digitally encoded information representative of plural linguistic expressions and including plural addressable lexicon storage blocks, each said block storing one or more lexicon entries, each said lexicon entry storing signals representative of a linguistic expression, each said expression including at least one alphanumeric character, C. database access means connected with said input means and with said database storage means for accessing information stored in said linguistic expression database, said database access means including master lexicon access means for addressably accessing each said lexicon storage block according to its skeletal collation range, said skeletal collation range being defined by upper and lower bounds of a collation sequence of linguistically salient word skeletons of said one or more linguistic expressions represented within a lexicon storage block, and D. output means connected with said database access means for generating a signal representative of linguistic information.