Formerly known as The ADT Corporation, ADT Inc., is a company that provides monitored security, interactive home, and business automation and related monitoring services in North America. The main markets are in the United States and Canada, where the company offers a range of products from home security systems, home automation, security cameras, fire, home and safety, and monitoring services. It also offers temperature, burglary, flood, fire and smoke, medical alert monitoring. The company was founded in 1874 by renowned American inventor Edward Augustin Calahan. This was in response to a nighttime break-in near Calahan’s home and was the first residential security system network.

The company is based at 1501 Yamato Road Boca Raton, Florida 33431 in the United States, and is listed in the New York Stock Exchange, Frankfurt Stock Exchange, and NASDAQ. Marc E. Becker chairs the board, and James David DeVries serves as the present President, Chief Executive Officer, and Director.

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