ADT or Adt may refer to:
The ADT Championship was a women's professional golf tournament on the U.S.-based LPGA Tour. The season-ending event on the tour, it became the LPGA Playoffs at The ADT from 2006 through 2008.
ABB Daimler-Benz Transportation (after 1999 DaimlerChrysler Rail Systems), commonly known under its brand Adtranz, was a multi-national rail transport equipment manufacturer with facilities concentrated in Europe and the US.
ADTRAN, Inc. is a provider of telecommunications networking equipment and internetworking products. Its headquarters are in Huntsville, Alabama.
AdTruth is a software product and the digital media division of 41st Parameter, a company headquartered in Scottsdale, Arizona with regional offices in San Jose, California; London, England; and Munich, Germany.
Adtech AG is a German–American digital marketing company, providing publishers, agencies and ad networks with products to manage, serve and evaluate online advertising campaigns, including display, video and mobile formats.
Adtile Technologies is an American company that develops and markets motion-sensing technology. The company’s headquarter is in San Diego, California.
AdTaily is a self-service advertising network company based in London. The company's service allows online publishers to sell ads directly.
The ADtranz low floor tram was introduced in the 1990s as the world's first tram with a completely low floor.