A useful feature of a digest is the lists of cases by name in tables found at the end of the digest. Using these name tables, you can find a case for which you have a name, but no citation. Digests are published by other companies than West Publishing. For example, Lawyer's Co-operative publishes a digest to accompany its Lawyers Edition Supreme Court reporter. Various state digests, such as California, are produced by other publishers.
Some looseleaf services contain their own digests to cases on particular subjects.
Once you are comfortable using one digest system, you will find it relatively easy to learn others. As this is only a basic overview of digests, please don't hesitate to consult a reference librarian for further assistance.