A refrigerator shelf includes a glass platform having an encapsulating rim which is integrally formed with a pair of downwardly extending wing members, each having a transverse threaded hole formed therein. The associated predetermined telephone number is included with call setup information when a wireless terminal in a private wireless network communicates via the access point so that a location of the wireless terminal can be determined based on the predetermined telephone number. A determination is conducted to decide whether a sender is authorized to send calendar information to another by examining registration rights. An opening sleeve is positioned in the inner mandrel and is movable from a closed position to an open position in which the fluid port is uncovered. Coordinate information according to a movement direction and a movement quantity is converted into an electrical signal, and a cursor is moved on a display screen of the computer.