What does mrw stand for?

Morale, Recreation, and Welfare (AD)

Maranao - Language symbol (ETLW)

Maximum Ramp Weight (SAUO)

Morale, Recreation, and Welfare - Military (AFM)

Morioka - Japan - Airport symbol (OAG)

Pro Glass, Sebring, FL - Manufacturer code for watercraft hull identification number (USCG)