GTKtalog is a disk catalog, meaning you can use it to create a really small database with images of files and folders of your CD-ROM. So you can browse all your CDs very quickly and see contents of certain files (such as tar.gz and rpm files). You can assign each folder and file a category and a description. You can search for files in your database with filename, category, description, or file information parameter and find on which CD the file you are looking for is.