Act

ACT stands for:

Engineering, transportation, space flight:

Additional Center Tank, an additional fuselage tank of an aircraft
Active Cylinder Management Technology, active cylinder deactivation from VW to save fuel
Advanced Concepts Team, a think tank of the European Space Agency ESA at the European Space Research and Technology Centre
Atacama Cosmology Telescope, a radio telescope in the Atacama Desert
the airport of Waco, Texas (IATA airport code)

Military:

Air Combat Tactics, an air combat procedure
Allied Command Transformation, NATO Strategic High Command, responsible for transformation

Companies, organizations and associations:

Action by Churches Together, an international alliance of churches for the purpose of providing aid in areas of need and crisis.
Associated Container Transportation, a former container shipping company
Association of Commercial Television in Europe, an association that represents the interests of commercial television broadcasters.
Azienda Consorziale Trasporti di Reggio Emilia, private railway and transport company in northern Italy
Aeltere Casseler Turngemeinde, a German gymnastics and sports club in Kassel
Aqaba Container Terminal, a container port near Aqaba, Jordan on the Red Sea

Science, psychology, medicine:

Access to COVID-19 Tools, access to Covid-19 tools, see Access to COVID-19 Tools (ACT) Accelerator
Activated clotting time, a measurement for the determination of blood clotting
Activated Complex Theory, a chemical theory of activation energies
Adaptive Control of Thought, a theory to explain human thought.
Acceptance and commitment therapy, a form of psychotherapy
Artemisinin-based combination therapy, a malaria therapy with artemisinin derivatives
Assertive Community Treatment, a form of psychosocial treatment for patients.
Autologous chondrocyte transplantation, a surgical technique ("cartilage replacement from the test tube")

Culture, education:

American College Test, a US-American standard test for university admission, see ACT (exam)
Astronomical Cuneiform Texts, Babylonian astronomical cuneiform texts, see Ephemeris Texts (Babylonia).
Act (band), a German-British pop music project of the 80s
ACT Performance Festival, a performance art festival by students of Swiss art schools

Computers, computer science:

Geography:

Arctic Circle Trail
Australian Capital Territory, the area in which the Australian capital Canberra is located.

Act stands for:

Act (music), music formation
Courtney Act (real name Shane Gilberto Jenek; born 1982), Australian drag queen and reality television personality.

act stands for:

Achterhoeks (ISO-639-3 code), dialect of Lower Saxony in the province of Gelderland
actual, a usage of interest calculation, see interest rate#act

.act stands for:

See also: