CD technology allows for storage capacities up to 650 Megabytes. Our pressed disc's, like the ones you get in a music or software store, have an aluminum top reflector layer, and clear plastic bottom layer into which little tiny depressions called "pits" are pressed down by a physical stamping process at our factory. Then another layer of plastic is laid down over the pits so they don't get filled in with oils and dirt. When a compact disc player scans a disc, it reads the "pits" on the disc, and your software converts those scanned dots and dashed into information or music.