The Royal Manticoran Mail Service, or RMMS, was the interstellar delivery service for mail in the Star Kingdom of Manticore, with its own fleet of mail ships. The service was not used for secure diplomatic dispatches, but many civilians wanted to be sure their mail was transmitted in complete security; for that reason, mail ships' secure data banks were completely physically separated from any other computer system aboard. Sybil Dalipagic's brother-in-law worked aboard mail ships for forty T-years. (HH10)