| Rank | Abbreviation | Meaning |
|---|
| ***** | ACIS | Alan Grayer, Charles Lang, Ian Braid, Dick Sower
| |
| *** | ACIS | Academic Information Systems
| |
| *** | ACIS | Accounting/Computer Information Systems
| |
| ** | ACIS | Automatic Caller/Customer Identification Service
| |
| ** | ACIS | Advanced Cellular Internet Service
| |
| ** | ACIS | Automatic Customer/Caller Identification System
| |
| * | ACIS | Airfone Customer Information System
| |
| * | ACIS | Association for Computing & Information Sciences
| |
| * | ACIS | Ameritech Customer Information System
| |
| * | ACIS | Access Control Interlock System
| |
| * | ACIS | American Commitee for Interoperable Systems
| |
| * | ACIS | Armament Carriage and Installation System
| |
| * | ACIS | Analytical Condition Inspections
| |
| * | ACIS | Andy, Charles, Ian's System
| |