".dcm" and ".dcmf" are filename extensions of "DiskCatalogMaker catalog file" format.
How to read the format?
On Mac OS X:
DiskCatalogMaker can read the file format. You can get the latest version of DiskCatalogMaker for Mac.
On other platforms:
There is no way to read the file format. You can export the contents as a text file using DiskCatalogMaker for Mac.