The Indus civilization  (also known as the Harappan Civilization, the Indus-Sarasvati or Hakra Civilization and sometimes the Indus Valley Civilization) is one of the oldest societies we know of, including over 2600 known archaeological sites located along the...

 Telecommunication is the assisted transmission over a distance for the purpose of communication. In earlier times, this may have involved the use of smoke signals, drums, semaphore, flags or heliograph. In modern times, telecommunication typically involves th...