6. The apparatus of claim 5 in which said table means include, a sub-table for each node in a decision tree identifying each appropriate word ending by reference to preceding characters in inverse order of appearance in a word, wherein each entry in said sub-table identifies, (a) an appropriate word ending, or (b) a different sub-table corresponding to a connected node in said decision tree or (c) a default condition, and wherein said continue address register means, after operation of said means to sum, addresses a specific entry in a sub-table.
5. The apparatus of claim 2 in which said decision means comprises: continue address register means, means responsive to each keycode signal, when produced by said means to store, to sum a keycode representing quantity and the contents of said continue address register means, and table means addressed by said continue address register means subsequent to operation of said means to sum to produce said representation of said appropriate word ending.