ATTSAutomatic Tape Tuning System
ATTSAutomatic Tape Time Select
ATTSAdvanced Text To Speech
ATTSActive Torque Transfer System
ATTSAmerican Temperament Test Society, Inc. (temperament evaluation of dogs)
ATTSAdvanced Telescope Tracking System (software)
ATTSAuto Teile Tuning Shop
ATTSAir Technical Training School (Thailand)
ATTSAdvanced Torque Transfer System (automotive)
ATTSAssociazione Torinese Tram Storici (Turin, Italy)
ATTSApex Telecommunications Training Solutions
ATTSAdrift Topic Tutorial System
ATTSAmerican Tax Token Society
ATTSAutomatic Test Technology Standards
ATTSAgricultural Tailgate Training Safety
ATTSAutomated Tire Tracking System
ATTSAssociation for Textile Technical Study
ATTSActive Tuning Test Sets
ATTSAT&T Solutions
ATTSAutomated Test Technology Standards
ATTSAdministrative Trade Training School (Pakistan)
ATTSAutomated Tank Target System
ATTSAcquisition Training and Tracking System
ATTSAmerican Telephone and Telegraph Solutions
ATTSAdvanced Total Transmission Services, Corp.
ATTSArkhangelsk State Technical University
ATTSAutomotive Technical Teaching Standards
ATTSAltus Thermal Training Suit
ATTSAgency Technology Transfer Staff
ATTSAddicted to the Stick
ATTSA Time to Smile (program for minority and underprivileged girls; Santa Rosa, California)
ATTSArkansas Technology Transfer Society
ATTSAll Types Transportation Services, Inc. (est. 1999)