6. A shorthand machine for recording and translating shorthand notes including a non-redundant binary tree look-up table comprising: a keyboard having keys representing letter symbols of a language; conversion means connected to said keyboard for generating a particular electric shorthand signal for each key or combination of keys pressed by an operator; a look-up table having a plurality of entries for electronically storing a translation dictionary; said look-up table further having main level and sublevel memory locations for storing said electric shorthand signals representing groups of one or more entry symbols, and electric signals representing groups of one or more translation symbols corresponding to the groups of entry symbols, said main level and sublevel memory locations containing no more than one of the groups of entry symbols; control means connected to said conversion means and to said look-up table; said control means capable of searching said look-up table entries to locate and read a particular electric translation signal corresponding to the particular electric shorthand signal generated at said conversion means; and display means connected to said control means for converting a predetermined number of said read translation signals into groups of display characters representing language words and displaying said words on a plurality of lines.
6. A shorthand machine for recording and translating shorthand notes including a non-redundant binary tree look-up table comprising: a keyboard having keys representing letter symbols of a language; conversion means connected to said keyboard for generating a particular electric shorthand signal for each key or combination of keys pressed by an operator; a look-up table having a plurality of entries for electronically storing a translation dictionary; said look-up table further having main level and sublevel memory locations for storing said electric shorthand signals representing groups of one or more entry symbols, and electric signals representing groups of one or more translation symbols corresponding to the groups of entry symbols, said main level and sublevel memory locations containing no more than one of the groups of entry symbols; control means connected to said conversion means and to said look-up table; said control means capable of searching said look-up table entries to locate and read a particular electric translation signal corresponding to the particular electric shorthand signal generated at said conversion means; and display means connected to said control means for converting a predetermined number of said read translation signals into groups of display characters representing language words and displaying said words on a plurality of lines. 15. The device defined in claim 6 wherein said control means is capable of accumulating the read translation signals in a text file.