ADT

==American District Telegraph==
===1874–1913===
===1913–1936===
===1936–1964===
===1964–present===
==ADT==
===1989–present===
ADT print.svg|Print version
===2007–2017===
In February 2007, ADT launched an updated logo. The logo was given a blue octagon inherited from the old Westec Security Corporation which was migrated to the "Secured by ADT" signs and a white outline was given.
===2017–present===
==External links==
Category:Apollo Global Management
Category:Technology
Category:Security companies
Category:Technology companies
Category:Technology companies in the United States
Category:Boca Raton, Florida
Category:Florida
Category:United States
Category:1870s
Category:1874