"S" . . "Buttonless Keyboard" . . "Optical button, Photo sensor, Keyboard, Time division multiplex"@en . "Buttonless Keyboard" . "1"^^ . "Buttonless Keyboard"@en . . . "There are several applications in which a buttonless keyboard might be useful. In exteriors, they can capitalize on the fact that without buttons the keyboard can be fully closed and therefore it is weather resistant. Moreover, they seem to be easily made in vandalism resistant forms. Their considerable advantage also lies in the fact that they can be made in various design conceptions. Usually, several approaches to the buttonless keyboards are practiced. In this paper a design of a simple optical-based keyboard is described." . . "Posp\u00ED\u0161il\u00EDk, Martin" . "There are several applications in which a buttonless keyboard might be useful. In exteriors, they can capitalize on the fact that without buttons the keyboard can be fully closed and therefore it is weather resistant. Moreover, they seem to be easily made in vandalism resistant forms. Their considerable advantage also lies in the fact that they can be made in various design conceptions. Usually, several approaches to the buttonless keyboards are practiced. In this paper a design of a simple optical-based keyboard is described."@en . . . "Buttonless Keyboard"@en . "1"^^ . . "RIV/70883521:28140/12:43868966!RIV13-MSM-28140___" . "RIV/70883521:28140/12:43868966" . . . . . "[31E05845B51F]" . . "28140" . . . . "125738" .