TELECOMMUNICATION TELECOMMUNICATION Any transmission, emission, or recep- tion of signs, signals, writings, images, and sounds or intelligence of any nature by wire, radio, visual, or other electromagnetic sys- tems. TELEGRAPHY A system of telecommunication that is concerned in any process providing transmission and reproduction at a dis- tance of documentary matter, such as written or printed matter or fixed images, or the reproduction at a distance of any kind of infor- mation in such a form. For the purposes of international radio reg- ulations however, unless otherwise specified therein, telegraphy means "a system of telecommunications for the transmission of written matter by the use of a signal code." TELEMETERING The use of telecommunication for automati- cally indicating or recording measurements at a distance from the measuring instrument. TELEMETRY POINTS Sampling points within a spacecraft from which onboard conditions, such as voltages, temperature, and so forth, are examined and encoded for transmission to the ground.