Abstract: A telephone operates as a time server for synchronizing an appliance or peripheral by accessing a time service over telephone lines to obtain an accurate geographic time for the telephone, and by transmitting a synchronizing pulse to the appliance at a predetermined time to set the time function of the appliance.

Abstract: A method and apparatus for continuously authorizing a computer for use. A proximity detection system provides a coded message from a badge on an authorized user to a proximity reader in communication with the computer. The computer contains a process either in its kernel, operating system, and/or application program to repeatedly and continuously detect the presence of an authorized user within a desired proximity of the computer. If an authorizing code is received from an authorized user, the computer continues to allow full use of the computer. If an authorizing code is not received, a desired feature of the computer (e.g., the display, the keyboard, the mode of the processor) is disabled until the authorized user again enters the proximity zone of the computer.

Abstract: A biotelemetry tracking and locating system uses a person's own physical or biological measurement as an identification code used by a tracked unit, e.g., a bracelet worn by a child, to track and/or locate the person from a tracking/locating unit, e.g., worn or carried by a parent. The tracking/locating unit includes a transmitter and optionally a receiver. The tracking/locating unit detects a combination of encoded biological measurements (e.g. body temperature, and/or heart rate) and combines the biological measurements into a substantially unique ID code. The tracking/locating unit may be carried, e.g., by a parent to track the continued presence within a reception range of, e.g., a child wearing the tracked unit. A directional antenna, e.g., a YAGI type antenna, in the tracking/locating unit allows the tracking/locating unit to determine which direction the tracked unit is in, e.g., with respect to the tracking/locating unit.