A detachable pet carrier for housing a pet that allows the pet to rest on one or more of its interior surfaces. When such a content is received at a device, a watermark extraction record is obtained and accessed to fulfill content screening obligations. There is provided a method and system for controlling the frequency of one or more processors in computer systems, responsive to an indication of a power failure, and thereby reduce its power consumption, so as to provide more power for writing write-pending data to a non-volatile data storage. A communication channel couples the front-end device and the back-end device. The logic state of the initial unknown data bit stored in the selected memory cell is then determined from the first, second, and third counts. The second data is used in adjusting a threshold value of the first memory cell.