According to embodiments of the invention, one or more implants in a body may be connected with optical fibers for transmitting data andor power to or from the implants. The narrow mask lines are formed by pitch multiplication and the wider mask lines are formed by photolithography. In larger systems, an external logic device determines the highest priority CAM device having a match and then provides that information to each CAM device in the system. Conductive labels are directly or indirectly couplable to the target sample. The system may also include filtering software to remove helmet motion artifact and other noise from the signal. The method further includes modifying information of a first application of a plurality of applications based on the first response input, wherein the first application is identified based on content of the first response input.