Include the source listings of any applications written at your installation with your set of documentation. (They often form the largest single element of documentation. Large installations with thousands of programs might prefer to keep such listings on microfiche or CD-ROM.) Make sure you include the relevant linkage-editor output with your source listings to avoid wasting time trying to find your way through a load module with an out-of-date link map. Be sure to include the JCL at the beginning of your listings, to show the libraries that were used and the load library in which the load module was placed.