File Extension RMS File Format AutoCAD Data File for Boss RMS RMS stands for AutoCAD Data File for Boss RMS. This was last updated in March 2012 By Margaret Rouse Browse File Extensions Alphabetically: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # Ask a Question. Find an Answer. Ask your peers a question about this file extension. Ask a Question Windows Rights Management (RMS) clients not working (FORMATTING OK REPOST) Using Rights Management Services in Exchange 2010 Can Rights Management Services, moderation, and MailTips be used together?