| Abbreviation | Definition |
|---|---|
| IWRF | International Wheelchair Rugby Federation |
| JERP | Junior Elite Rugby Program |
| JRL | Junior Rugby League |
| JRLC | Junior Rugby League Club |
| JSYR | Jersey Shore Youth Rugby |
| KRRS | Kenya Rugby Referees Society |
| LFR | Live For Rugby . |
| LNR | Ligue Nationale de Rugby |
| LORC | Lille Ouest Rugby Club (France) |
| LRFC | Lydney Rugby Football Club |
| LRLF | Lebanese Rugby League Federation |
| LTRD | Long Term Rugby Development |
| MARS | Muffin Andrew Rugby Start |
| MCRC | Middlebury College Rugby Club |
| MGRP | Maple Grove Rugby Park |
| MICR | Memphis Inner City Rugby |
| MLR | Major League Rugby |
| MRFC | Melbourne Rugby Football Club |
| MRFC | Moseley Rugby Football Club |
| MRFU | Malta Rugby Federation Union |