| Acronym | Meaning |
 | SW | Short Wave |
| LF | Load Factor |
| SF | Signaling Frequency |
| LS/ST | Light Shield/Star Tracker |
| SDI | Selective Dissemination Of Information |
| IVL | Lntervatometer |
| SPAD | Subsystem Positioning Aid Device |
| SMTAS | Shuttle Model Test And Analysis System |
| EES | Escape Ejection Suit |
| NDI | Nondestructive Inspection |
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