| 摘要 |
<p>A display device comprising a set of solids (71), each of which has a number of faces, indicia on each of the faces, the indicia being so selected as to permit a particular predetermined range of information to be displayed by the solids of the set, and means (70) whereby the solids (71) can be retained with one of the faces being visible. In a specific form the device is used as a calendar and the solids are cubes and the total of solids in the set are used to make the required display. </p> |
