| Acronym | Meaning |
 | LEN | Length |
| MTV | Message Translation & Validation |
| PAX | Patuxent River |
| CTR | Centered |
| CTIC | Contractor Technical Information Code |
| COBOL | Common Business Oriented Language |
| F/C | Flight Control |
| FDS | Flight Director System |
| ISSI | International Software Systems Incorporated |
| CATC | Carrier Air Traffic Control Center |
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