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Text File  |  1992-09-02  |  300b  |  10 lines
  1. A signal is any sign, gesture, sound, or 
  2. action that conveys information. Examples 
  3. include the use of flags (semaphore), light 
  4. (traffic and railway signals), radio 
  5. telephony, radio telegraphy (Morse code), 
  6. and electricity (telecommunications and 
  7. computer networks). 
  8.  
  9. Subject by: Simon Wiseman
  10.