ATS

ATS can mean:

"Societies"
*American Tarantula Society
*Adventist Theological Society
*American Temperance Society, an early American civic organization promoting temperance
*American Thoracic Society, a society for lung physicians, health related professionals and researchers

"Systems"
*Airport Transit System, a rail system at Chicago O'Hare International Airport
*Alarm transportation system found in Fire alarm control panels.
*Alberta Township System
*Alternative Trading Systems, SEC's general classification for equity exchange alternatives in US equity trading
*Antarctic Treaty System
*Applicant tracking system
*ATS Automation Tooling Systems
*Automated Targeting System, a United States government rating system used to help assess the probability that a visitor to the U.S. is a terrorist or criminal
*Automated trading system

"Services"
*Air Traffic Services, regulations published on the Annex 11 of the Convention on International Civil Aviation
* Alpine Training Services, an outdoor education company
* Assistive Technology Supplier
* Automatic transfer service account
* Auxiliary Territorial Service, the women's branch of the British Army in World War II
* Lowercase 'ats', in legal documents, is "At Service To" as defined in Black's Law Dictionary. For example: Law Society of California: Joe Defendant ATS Jane Plaintiff. Generally used to describe the reverse situation listing the Defendant prior to the Plaintiff when used as a reference on third party (or insurer) documents. (Others have said that it is the synonymous with versus)

Other
* Advanced Technology Systems, Inc.
* Advanced Technology Solutions
*Against the spread (i.e. spread betting), in sports betting
* Alien Tort Statute

* American Tribal Style Belly Dance
* Angel the Series ("AtS")
* Anti Terrorist Squad
*Anti-Tetanus Serum
* Antoinette Tubman Stadium in Monrovia, Liberia
* Asbury Theological Seminary, a Methodist seminary based in Wilmore, Kentucky.
* Association of Theological Schools in the United States and Canada, the primary accreditation agency for North American seminaries
* Australian Treaty Series
* Austrian schilling, the ISO 4217 currency code for the former currency of Austria
* Automate The Schools, the Student Information System of the New York City Department of Education
* Automatic Train Stop
* Automatic transfer switch, in an electrical system, switches power automatically to a generator or other standby power source after a power interruption.
* Automobili Turismo e Sport, an Italian low-volume automotive manufacturer and Formula One team that operated between 1962 and 1965
* Auto Technisches Spezialzubehor, a German rims manufacturer that was active as a Formula One team from 1977 to 1984
* 'Acute Thespian Syndrome', a humorous abbreviation used by some British doctors in patients' notes to denote faked illness.