GE “Watt-Mizer” type 150A/135WM/CL incandescent lamp with krypton fill-gas to improve efficacy. Type number indicates 150 watt-equivalent A-lamp, rated for 135 watts, Watt Miser type with CLear envelope. Characteristics: aluminum medium-screw base with glass insulator and brass contact. CC8 tungsten filament with center support, crimp connectors. Tipless A-shape envelope. Printed on top: “.150A/136WM/CL. / 9 [GE logo] Y / 135W / 120V / Canada / Watt-Miser”.
The Global Positioning System (GPS) consists of a network of orbiting satellites that transmit special time signals. GPS receivers detect the signals from several satellites and calculate the user’s position with high precision. While many civilian uses have been developed, the system originated as a tool for the U.S. military. Other nations also adopted GPS for military use as seen on this 1992 model 1000M5 receiver. The buttons are labeled in Arabic for use by the Egyptian Army.
In the late 1990s, Magellan released the first turn-by-turn navigation system for civilian drivers. The PathMaster hard-wired into a car, allowed users to see a map on a display screen and follow directions. The large computer received GPS data from an antenna and sent it to the display. A small card with a portable hard drive containing map data was inserted into the computer.