File Extension PRS File Format Procedure file (dBase IV) PRS stands for Procedure file (dBase IV). 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 Calling RPG Proc from COBOL ILE Prototype Mismatch error when using a datastructure field What is the best practice when using vb6/ado/ms sql server stored procedures to retrieve updatable recordsets that can be filtered and sorted?