| Acronym | Meaning |
| APCA | Air Pollution Control Association |
| OCM | Ocean Circulation Model |
| IUCR | International Union Of Crystallography |
| NSC | Network Systems Corporation |
| MCA | Micro Channel Architecture |
| OCTA | Oxidizing Capacity Of The Troposphere Atmosphere |
| OCE | Division Of Oceanic Sciences |
| CDC | Climate Data Center |
| DSDP | Deep Sea Drilling Project |
| SLAC | Stanford Linear Accelerator Center (or Collider) |