Abstract: A keyboard/mouse platform system. The system comprises an array of components assembled onto any suitable desk or workstation. The components include a keyboard/mouse tray, a slide rail, a clamp/bracket secured to a proximal end of the slide rail above the slide rail, a post clamp attached to the distal end of the slide rail on the underside of the slide rail, and a vertical support post that is secured within the post clamp and supports the distal end of the slide rail underneath the desk. The system would be assembled, such that the clamp supports the proximal end of the slide rail by gripping the desk, and the support post supports the distal end of the slide rail. Optionally, the system can include a height-adjusting mechanism that connects the keyboard/mouse tray to the slide rail and is capable of elevating or lowering the keyboard/mouse tray.