Abstract: A data entry keypad assembly, comprising a keypad including an array of keys, and a positioning locator secured to the keypad to form a unitary keypad assembly therewith, whereby the keypad assembly is selectively positionable at a desired locus of a data field to permit accurate inputting of data by the keypad to a digital computer operatively coupled therewith. Data processing systems comprising a digital computer operatively connected to such keypad assembly are disclosed, together with a source code computer program operatively associable with a digital computer of a type employing an MS-DOS, or compatible, operating system, and arranged to actuate audio signal generating means, to provide audio feedback indicative of a specific key of the keypad being actuated, and to assist in minimizing data entry inputting errors.