RRT
RRT or Rrt may refer to:

Radio Reconnaissance Platoon
Railroad Tycoon (series)
Rainbow Round Table
Rapidly exploring random tree
Reference Rendering Transform (Academy Color Encoding System)
Registered Respiratory Therapist
Renal replacement therapy
Randomized response technique
Rational root theorem in mathematics
Refugee Review Tribunal in Australia. Recommended Replacement Time (In Pacemaker and Internal Defibrillator, time to replace the device because of exhaustion of the batteries)