| Acronym | Meaning |
 | ICS | Intercom System |
| ECP | Engineering Change Proposal |
| EM | Engineering Model |
| NPC | National Processing Centers |
| VM/CMS | Virtual Machine/Conversational Monitor System |
| EEC | European Economic Community |
| NSC | Network Systems Corporation |
| HRD | Hurricane Research Division |
| LSM | Land Surface Model |
| SLAP | Space Link Access Protocol |
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