the expansion of ABS is Anti Lock Braking System. It is a highly secured mode of braking. In a normal car braking the wheels get locked and the driver does not have full control over the wheels, whereas in ABS the Wheel does not get blocked and the driver has full control over the steering wheel which gives much effective braking.

ABS is a three-letter acronym that may refer to:

* Able Seaman (rank) or Able Seaman (occupation)
* Absolutive case
* Abu Simbel Airport (IATA airport code: ABS), in Abu Simbel, Egypt
* Acrylonitrile butadiene styrene, a plastic
* Acute Bacterial Sinusitis, sinus inflammation resulting from bacterial infection.
* Airport Base Station, Apple WLAN solution
* Akita Broadcasting System, a broadcasting station in Akita Prefecture, Japan
* ABS-CBN, a broadcasting corporation in the Philippines
* Albino Blacksheep, a website
* Alternative Business Structure a putative UK legal entity
* American Bible Society
* American Bouldering Series, the national governing body of competitive bouldering in the United States.
* American Boy Scouts, an early Scouting organization
* American Bureau of Shipping
* Amniotic band syndrome
* Anchor Bible Series
* Animal Behavior Society
* Anti-lock braking system (translated from German, Antiblockiersystem)
* Arch Build System, an Arch Linux tool
* Archbold Biological Station, a research station in Florida, USA
* Asset-backed security, a financial term
* Association of Broadcasting Staff
* ABS, the Australian Broadcasting Corporation's Adelaide TV station
* Australian Bureau of Statistics, Australia's official statistical organisation
* Automatic Brightness Stabilizer / Automatic Brightness Stabilization controller, adjusts the x-ray generator to maintain a preset image brightness level during fluoroscopy
* Adult Book Store
* Abingdon boys school, a Japanese Rock band.
* Automatic Block Signal, a railroad signal system in the United States

Abs or abs can also be:

an abbreviation

* Abdominals, abdominal muscles
* Absolute value of a number, its value without regard to sign; its magnitude
* Absorbance in regards to Spectroscopy
* All Blacks, the rugby team of New Zealand