| Academic Department Information System | Academic & Science |
| Alumni Development Information System | Academic & Science |
| Associateship in Documentation and Information Science | Academic & Science |
| Armor Des Regs | Business |
| Approved for Draft International Standard Circulation | Business |
| Address Data Interchange Specification Working Group | Business |
| ACSYS Data and Information Service | Business |
| Asociatia pentru Dezvoltare si Incluziune Sociala | Community |
| Abu Dhabi Indian School | Community |
| Arrival and Departure Information System | General |
| Automatic Dealer Information Systems | General |
| Americas Digital Information System | General |
| Air Dryer Integrated System | General |
| Advanced Digital Imaging System | General |
| Automatic Data Interchange System | General |
| Audible Driver Instruction System | General |
| Advanced Driver Information System | Governmental |
| Aviation Data Integration System | Governmental |
| Abteilung Des Intensive Sorge | International |
| Alcohol Drug Information Service | Medical |
| Alcohol and Drug Information School | Medical |
| Alcohol and Drug Informational School | Medical |
| Alcohol Drug Information School | Medical |
| Alcohol and Drug Information Service | Medical |
| Anxiety Disorders Interview Schedule | Medical |
| Automated Distributed Intelligence System | Military and Defence |
| Army Diagnostics Improvement System | Military and Defence |
| Angle Detecting Inclined Sensor | Military and Defence |
| Australian Dairy Industry Survey | Regional |
| African Diaspora Investment Symposium | Regional |
| Accept/display Interface System | Softwares |
| Nasa Aviation Data Integration System | Space Science |
