| Acronym | Meaning |
 | APCA | Air Pollution Control Association |
| RAS | Retrospective Analysis System |
| DDB | Delayed Direct Broadcast |
| AM | Audio Modulation |
| USN | United States Navy |
| ASP | Alarms And Shutdown Process |
| ASQC | American Society For Quality Control |
| CDC | Control Data Corporation |
| OBAC | Office Of Budget And Control |
| WITI | Weather Information Technologie |
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