A work station comprises a mounting bracket adapted to be mounted to a surface. An upper arm and a lower arm are mounted to the mounting bracket for pivoting motion about a first vertical axis. A track is pivoted to the upper arm and the lower arm about a second vertical axis where the track supports a vertically displaceable carriage. The carriage may support a monitor and work platform where the work platform supports a key board tray. A lift system supports the carriage for vertical movement. Work station mounting systems are also provided for movably supporting a work platform.