| Acronym | Definition |
|---|
| RLSD➣Remote Line Signal Detect |
| RLSD➣Received Line Signal Detector |
| RLSD➣Received Line Signal Detect (signal line) |
| RLSD➣Random Lake School District (Wisconsin) |
| RLSD➣Richard Lees Steel Decking (Derbyshire, East Midlands, England, UK) |
| RLSD➣Rigid-Lock Stack Down (subsea drilling system) |
| RLSD➣Red Lake School District (Red Lake, MN) |
| RLSD➣Research and Laboratory Services Division (United Kingdom) |