Chording keyboard for generating binary data

A computer data entry keyboard comprising:

• ten key-switches, each key-switch corresponding to, in continuous intimate contact with, and adapted to be selectably operated by a particular terminating member of a pair of operator's hands, said switches being selectably operable singly and in combination to generate a ten digit binary number, each digit of said binary number corresponding to a particular terminating member of said operator's hands;
• user alterable memory means for storing character and character combinations in sequential memory addresses, including:
• (a) read only memory means for storing and retrieving standard characters and character combinations, each corresponding to a particular one of said selective ten digit binary number;
• and
• (b) a random access module for operation in an alter mode wherein operation of said key switches stores characters and character combinations each corresponding to a particular one of said selected ten digit binary numbers, at sequential memory addresses to labels key switches as desired, and for operation in an access mode wherein operation of said key switches retrieves characters and character combinations, each corresponding to said particular one of said ten digit binary numbers, from said sequential memory addresses;
• and
• memory address table means for converting table locations each corresponding to a different ten digit binary number generated by selected operation of said key switches to memory addresses corresponding to starting memory addresses of characters and sequential character combinations.