In 1874, 57 diverse "district" telegraph delivery companies merged to create the new American District Telegraph Company — the forerunner of today's ADT.
Explanation
This is a quiz that address the history of ADT and ASI.
In early 1998, ADT, Ltd. was acquired by Tyco International Ltd. Today, ADT has residential and commercial coverage in about 230 major U.S. markets.
Absolute Security Inc., was founded in 1997.
In 1909, Western Union (and ADT) came under the control of AT&T, whose company policies and organization changed the ADT organization. In 1910, AT&T President Theodore N. Vail took the reins at AT&T, and as a result, ADT concentrated fully on the signal business.
As ADT began to turn its attention toward the international market, it became a publicly owned company in 1969 and its stock was listed on the New York Stock Exchange.