The file OldMmaGB.m loads in old commands which we do not actively support as well as new untested ventures which may not work reliably and whose documentation, in NCOLDDOC, contains few complete english sentences.
A session begins by
Incidentally OldMmaGB.m is a file in the NC/NCAlgebra directory whose function is to load files found mostly in the NC/NCAlgebra/OldMmaGB directory.