Abstract: A system for converting graphic symbols on a computer data entry keyboard to another set of graphic symbols such as a foreign language or scientific symbols or mathematical notations is disclosed. The system comprises a plurality of individual keycaps, each keycap being sized for fitting over the upper surface of a single data entry key on the computer data entry keyboard. Each keycap has two indicia inscribed thereon. The first indicia, corresponding to the graphic symbol to be displayed upon the skriking of the data entry key is inscribed on the upper exterior surface of the keycap. The second indicia, corresponds to the graphic symbol on the upper surface of the data entry key over which the keycap is positioned. A cabinet having a columnar orientation for receiving the keycaps in a stacked relationship when the keycaps are not in use and operation is also disclosed. A lid protects the keycaps when they are stored in the cabinet.