Abstract: An integral keyboard and mouse platform assembly is adapted for use on straight, curved or diagonal work surfaces of a work desk. The platform comprises a platter having a front edge, opposing side edges and rear edge. The rear edge is defined by a radiused transition from each side edge into a rearwardly projecting tongue. The front edge has a scalloped face with three symmetrical forwardly protecting lobes. The rearwardly projecting tongue has securements on its underside for securements to a suitable mount. The side edges are space apart sufficiently to provide a keyboard support and a mouse support all on the level of the upper surface of the platter. A keyboard palm rest is provided for attachment to the front edge and extends across to the forwardly projecting lobes and a mouse palm rest for attachment to the front edge and extending across one of the lobes to proved for the right hand or left hand mousing areas on the platter.