| Abbreviation | Definition |
|---|---|
| ACGI | Ariston Consulting Group, Inc. |
| ACGL | Arch Capital Group Ltd |
| ACHC | Access Community Homebuyer Center |
| ACHC | Acton Community Housing Corporation |
| ACHC | Arlandria Chirilagua Housing Cooperative |
| ACHC | ASRC Construction Holding Company |
| ACHF | Athens Clarke Heritage Foundation |
| ACHI | Air Center Helicopters Inc |
| ACI | Accelerated Care Inc |
| ACI | Active Construction Inc |
| ACI | Administrative Concepts Inc |
| ACI | Advanced Concepts, Inc. |
| ACI | Affordable Comfort Inc |
| ACI | Air Cargo, Inc. |
| ACI | Albertsons Companies Inc |
| ACI | Alternate Concepts Inc |
| ACI | Apartment Consultants Inc |
| ACI | Arch Coal Inc |
| ACI | Associated Communication Inc |
| ACI | Aurora Cable Internet |