19. An digital data processing apparatus for electronic spelling correction comprising A. input means for accepting a signal representative of a suspect 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 informaticn 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. database verification means connected with said input means for locating within said linguistic expression database an expression substitutable for said suspect linguistic expression, said database matching means including master lexicon matching means for identifying a master lexicon expression substitutable for said suspect expression, and E. output means connected with said database matching means for generating a signal indicative of the success of locating within the database an expression substitutable for the suspect expression.
20. An apparatus according to claim 19 wherein said master lexicon matching means comprises means for generating a linguistically salient word skeleton of said suspect expression and a linguistically salient word skeleton of at least one said master lexicon expression, and for comparing said skeletons to generate a signal indicative of a match thereof.