| Subject | English | Thesaurus |
| railw., abbr. | Atlantic Cargo Services A B | ACSU |
| railw., abbr. | Atlantic Cargo Services AB | ACXU |
| ocean., abbr. | Atlantic Climate Change Program | ACCP |
| ocean., abbr. | Atlantic Coastal Action Program | ACAP |
| Nasdaq, abbr. | Atlantic Data Services, Inc. | ADSC |
| tradem., abbr. | Atlantic Information Services, Inc. | AIS |
| ecol., abbr. | Atlantic Water Resources Program | AWRP |
| ocean., abbr. | International South Atlantic Buoy Program | ISABP |
| NYSE., abbr. | Mid- Atlantic Medical Services, Inc. | MME |
| tech., abbr. | United States Atlantic Research Program | USARP |
