A computer workstation mounting device is provided which permits devices to be accessed by operators in a variety of positions including sitting, standing, or from a wheelchair. The invention permits said devices to be moved in a wide variety of vertical, horizontal, and rotational ranges of motion, and permits the devices to be moved clear of the work area while performing other tasks, or safely moved to a position near the ceiling for security or additional workspace conservation. The invention uses a simple, low maintenance counterweight principle for its vertical travel. It also possesses a simple tilt and swivel mechanism, swivel bracket (32), and dual parallelogram arm assembly for its horizontal and rotational ranges of motion. The invention also incorporates the counterweight principle for maintaining the data cables (14) in an organized, aesthetically pleasing manner without loops or kinks through all ranges of motion. Additionally provided is a friction lock (124) for stability of the monitor arm assembly in its vertical travel. Provision for the central processing unit (58) to be mounted atop the column (38) increases computer security.