| Acronym | Meaning |
| HORIZ | Horizon |
| M | LAMonochrome Lens Assembly |
| SRCB | Software Requirements Change Board |
| CA | Cone Angle |
| LEM | Laboratory Environment Model |
| PDR | Preliminary Data Requirements |
| V | Voltage |
| GEDAC | General Electric Detection And Automatic Correction |
| IUS | International Ultraviolet ExPlorer |
| CB/DC | Circuit Breaker (dc Only) |