At special times during the software development process, you might want to create a "virtual snapshot" of your software system. You do this in SNiFF+ by assigning a selected version of all the files in your software system the same symbolic name. In SNiFF+, the set of all file versions having the same symbolic name is referred to as a configuration, and the symbolic name assigned to the set is its configuration name. The process of creating a single configuration and associating it with a symbolic name is called freezing a configuration.
Note that