File Extension SC File Format IRIS Showcase drawing / presentation Header SC stands for IRIS Showcase drawing / presentation Header. 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 Error Message with MAPI sessions Showcase Query 8.0 CDs or DVDs How to speed up AS/400 SQL?