| Acronym | Meaning |
| RTL | Radar Training Lab (US Army) |
| RTL | Radio Team Leader |
| RTL | Rate Tracking Loop |
| RTL | Re-education Through Labour (China) |
| RTL | Regimental Training Line |
| RTL | Research & Technology Laboratories (AVRADCOM) |
| RTL | Restricted Target List |
| RTL | Rolling Target List |