cc:/Typist/enclosures
An individual writing a letter usually omits these items.
It is assumed that you will keep a copy of the letter. If you are supplying
copies to people other that the addressee, it is common to put a "cc:" list at
the bottom left of the last page ("cc" originally stood for "carbon copy" to).
When the letter is prepared by a professional typist, it is common for the
initials of the typist to be supplied at her bottom. If there are enclosures,
that fact is often noted there too.