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- Initialism of .
- Shipments without a valid RMA number will not be accepted.
- (US, military) Initialism of ; also RMAA.
- 2013, David Banagis, Twenty-Three Days at Sea: A Sailor's Story, Bloomington, IN: Abbott Press, →ISBN, page 12:
- Several of the recruits had special leadership responsibilities within the Company, the most significant being the Recruit Chief Petty Officer (RCPO) and the Recruit Master at Arms (RMA). […] The person responsible for being RCPO changed during the end of our training, but the RMA, who was responsible for maintaining good order and discipline, did not make it past the mid point.