Abstract: A manual data entry keyboard, having left hand and right hand clusters of keys, is separated medially by an interposed, auxilliary matrix of keys comprising an [m.times.n] array of keys, where m and n are integers--m at least 4, n at least 1. In one embodiment the matrix includes a [5.times.2] array of keys which serve as a numeric keypad, accessed by the index fingers and thumbs, obsoleting the [1.times.10] array of number keys commonly included with the QWERTY cluster in existing English language keyboard arrangements. Top row accessory characters may be entered without the shift and are grouped in clusters in the top row and positioned to reflect the order of entry of elements of these groups in the usual flow of data. Punctuation keys are clustered in the right hand area of the keyboard, and except for the period and comma, are readily accessed by the little finger. Columns of keys, additional to the [5.times.