A workstation is disclosed. The workstation includes a tabletop or desktop having a work surface assembly that has a base structure, a cover member, and a brake assembly. The cover member is supported by the base structure and defines a work surface arranged at an inclination relative to a horizontal surface. The cover member is adapted to slide relative to the base structure between an extended position and a retracted position. Moreover, the brake assembly is adapted to prevent the sliding of the cover member relative to base structure and holds the cover member stationary with the base structure.