Various apparatus and systems, as well as methods and articles, may include the use of several compositions, such as solder formulations, including about 78%-83% by weight of lead, about 9%-11% by weight of antimony, about 1%-3% by weight of silver, and a balance of tin. A delay-step method determines a delay for each packet in a stream of packets generated at a regular interval. Further said means for electronically locking may be an electromagnetically operated lock and a keypad. Each bit line provided in the usable region is connected via a select transistor to the corresponding main bit line.