A digital memory system includes a memory cell, a bit line, a voltage generator a controller and a charge integrity estimating module. A user is presented with a unified user experience that reduces the time and expertise required to utilize the independent basic service set functionality. Thanks to the invention, the luminous efficiency of the diode is very substantially improved. The medium can be a multi-image sheet containing regions of overlapping images where different images are visually predominant at different viewing angles, and the movable base can comprise a gaming reel. A 1553 data communication method is also provided.