| ATD | A Terrific Department 
| Others |
| ATD | A Total Disappointment
| Others |
| ATD | Academy of Truck Driving
| Others |
| ATD | Acceptable Time Delay
| Others |
| ATD | Accounting Technicians Diploma
| Others |
| ATD | Accredited Tier Designer
| Others |
| ATD | Achieving the Dream
| Others |
| ATD | Active Torque Dynamics
| Others |
| ATD | Actual Time of Departure
| Others |
| ATD | Acute Tryptophan Depletion
| Others |
| ATD | Adaptable Type Definitions
| Others |
| ATD | Adaptive Threat Defense
| Others |
| ATD | Address Transition Detection
| Others |
| ATD | Adjustable Type Definitions
| Others |
| ATD | Adjustment Transfer Debit
| Others |
| ATD | Advance Tuition Deposit
| Others |
| ATD | Advanced Technology Demonstration
| Others |
| ATD | Advanced Technology Demonstrator
| Others |
| ATD | Advanced Threat Defense
| Others |
| ATD | Advanced Threat Display
| Others |
| ATD | Advanced Trial Dog
| Others |
| ATD | Advanced Tuition Deposit
| Others |
| ATD | Advice Transfer Debit
| Others |
| ATD | Aerosol Transmissible Disease
| Others |
| ATD | Aerosol Transmissible Diseases
| Others |
| ATD | After the Deadline
| Others |
| ATD | Aftertreatment Device
| Others |
| ATD | Agency Trading Desk
| Others |
| ATD | Aide a Toute Detresse
| Others |
| ATD | Airspace Technology Demonstrations
| Others |
| ATD | Algorithms for Threat Detection
| Others |
| ATD | All Terrain Drive
| Others |
| ATD | All Together in Dignity
| Others |
| ATD | Alliance of Therapy Dogs
| Others |
| ATD | Along Track Distance
| Others |
| ATD | Alpha Tau Delta
| Others |
| ATD | Alternative To Detention
| Others |
| ATD | Alternatives To Detention
| Others |
| ATD | Alzheimer Type Dementia
| Others |
| ATD | Ambient Temperature Display
| Others |
| ATD | American Tire Distributors
| Others |
| ATD | American Truck Dealers
| Others |
| ATD | Anthropomorphic Test Device
| Others |
| ATD | Anthropomorphic Test Dummy
| Others |
| ATD | Anti Theft Device
| Others |
| ATD | Anti Torture Dummy
| Others |
| ATD | Applied Thermo-Dynamics
| Others |
| ATD | Applied to Deductible
| Others |
| ATD | Approval To Drive
| Others |
| ATD | Apricot Trading And Distribution
| Others |
| ATD | Aquitaine Transmission Distribution
| Others |
| ATD | Arrid Total Deoderant
| Others |
| ATD | Art Teaching Diploma
| Others |
| ATD | Arthur T Demoulas
| Others |
| ATD | Association for Talent Development
| Others |
| ATD | Association of Talent Development
| Others |
| ATD | Association Trophee Dragster
| Others |
| ATD | Asynchronous Time Division
| Others |
| ATD | Attention to Detail
| Others |
| ATD | Attribute Discovery
| Others |
| ATD | Authorized Terminal Distribuitor
| Others |
| ATD | Auto Theft Division
| Others |
| ATD | AutoLog Test Data
| Others |
| ATD | Automated Traction Device
| Others |
| ATD | Automated Trading Desk
| Others |
| ATD | Automatic Take Down
| Others |
| ATD | Automatic Tournament Drag
| Others |
| ATD | Automatic Transmission Design
| Others |
| ATD | Automation Testing and Design
| Others |
| ATD | Automotive Technologies Department
| Others |
| ATD | Automotive Technology Day
| Others |
| ATD | Automotive Technology Degree
| Others |
| ATD | Automotive Test Dummy
| Others |
| ATD | Automotive Tool Distributor
| Others |
| ATD | Automotive Trade Database
| Others |
| ATD | Autonomous Target-Decoy
| Others |
| ATD | Aviation Test Directorate
| Others |