Abstract: An interactive keyboard and display apparatus is used to enter ideographic characters in a computer or other utilisation device. The characters are defined by manually selecting displayed symbols such as phonemes, strokes, radicals and inflective tones represented in displayed key cells which are arranged in a matrix for rapid selection. Simultaneous multiple key cell selection is possible for accelerated character entry. The keyboard and display are integrated in a format suitable for replacing conventional keyboards. To avoid spurious entries, a pre-determined amount of pressure must be applied to the display panel when entering a symbol or character.

Abstract: A musical instrument is disclosed which is constructed of a group of taut strings arranged to be strummed, each string being connected to operate an analog switch capable of producing a graduated signal that is directly proportional to the amplitude of vibration of its string, an extrinsic sound source in circuit with each analog switch, the sound source having a variable volume which is varied directly proportional to the strength of the signal from the analog switch, a number of switch means arranged in a keyboard, each of which may close the circuit to one or more preselected sound sources for which the switch means are closed and the strings are vibrating.