A wall mounted modular workstation system utilizes individually mountable modules, such as a keyboard/monitor module, a CPU module, and a medical supply module, that may be each be selectively positioned, mounted, rearranged, used or not used, and/or added or removed at a later time. The individually mountable modules are formed with mountings and vertically located openings for electrical lines and module to module ventilation, which reduce/prevent creation of dust during mounting or later modification of the system.