An air operated pump uses a magnet mounted in the valve cup of the air motor and two reed sensors mounted in the valve cover to monitor the speed and position of the valve. In one embodiment, the system may include an input device, an input interface, a processor, and a display. When a target assembly or subassembly for similarity determination is inputted via an input device, assemblies or subassemblies similar to the target assembly or subassembly are retrieved from the similar data storage device, and the retrieved assemblies and subassemblies are displayed on a display device. This encoded identifier in the received cookie is used for accessing the cached data.