Question

I was wondering if someone could please explian to me the three types of numeric filing/numbering system or if there is a web-site that can help me I am not understanding this thanks very much for your help
Ms. Sue
These sites may help you.

http://www.deskdemon.com/pages/uk/information/skills/mfile

http://osulibrary.oregonstate.edu/archives/handbook/chapter2/record_6.1.html