| Acronym | Meaning |
 | MSE | Mechanical Support Equipment |
| PORCN | Production Oi-der Records Change Notice |
| CIU | Communication Interface Unit |
| HUM | Humidity |
| MP&C | Maintenance Planning And Control |
| HAA | High Altitude Abort |
| LS/ST | Light Shield/Star Tracker |
| HA | High Altitude |
| HD | Horizontal Drain |
| SSPS | Space Shuttle Program Schedule |
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