File Extension PDS File Format Hardware assembly source code file (Pldasm) PDS stands for Hardware assembly source code file (Pldasm). 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 FTP from PC Server to AS/400 Problems with OS upgrade Problems Deleting a file in IFS directory?