You can arrange groups of data sets into several UNIX mount directories (or PC mount drives) by using MVS naming conventions to mount specific data sets at each mount point. For example, you could mount user1.project1 to get all data sets beginning with user1.project1 mounted at one point in the local file system, and you could mount user1.project2 at another point. This would create the effect of two distinct directories (or drives), one containing the user1.project1.* data sets, and the other containing the user1.project2.* data sets.