Abbreviations beginning with a

ACTAAccess to COVID-19 Tools Accelerator
Governmental » United Nations

ACTAAdministrative Council for Terminal Attachments
Governmental » Council

ACTAAlliance for California Traditional Arts
Governmental » Alliances

ACTAAsteroid And Comet Tracking Agency
Governmental » NASA

ACTAAssociation De Coordination Technique Agricole
International » French

ACTAAccess to COVID-19 Tools Accelerator
Medical » Healthcare

ACTAAccess to COVID-19 Tools Accelerator
Medical » Vaccine

ACTAAdrenocorticotropic Hormone
Medical » Physiology

ACTAAcademisch Centrum Tandheelkunde Amsterdam
Miscellaneous » Unclassified

ACTAAcademisch Centrum Tandheelkunde Amsterdam (Amsterdam Academic Centre for Dentistry, Holland)
Miscellaneous

ACTAAcces Creativity Theatre Arts (Bristol England community theatre)
Miscellaneous

ACTAAfrican Council of Touring and Automobile Clubs
Miscellaneous » Automotive

ACTAAgainst Cruelty to Animals
Miscellaneous

ACTAAir Traffic Control Association
Miscellaneous

ACTAAlameda Corridor Transportation Agency
Miscellaneous

ACTAAlameda Corridor Transportation Authority (California)
Miscellaneous

ACTAAlameda County Transportation Authority
Miscellaneous

ACTAAlbertville Controle Technique Automobile
Miscellaneous » Automotive

ACTAAllensbacher Computer- und Telekommunikations-Analyse (German: computer and telecommunications analysis of Allensbach)
Miscellaneous