A reverse-search function may accept user input and search back through previously executed and stored data forwarding device control instructions for a data forwarding device control instruction, at least a part of which matches a search string input by the user. They provide, in real time, a continuous and customized auditory quality feedback to the user for an image displayed by the camera in the viewfinder, to help the user to decide whether to take a photograph or not for said image. Permanent magnets comprising neodymium or similar high-energy, rare-earth materials provide reach-out magnetism. Since the present method does not involve animal testing, it is an extremely reproducible, rapid, and accurate method for predicting whether an implanted composition or material will induce bone growth without the need for in vivo assays.