Hi SnookieStC,
Not sure I understand your question. Please define "use".
If this is a license question, separate companies must have separate license
to use the Access product.
There is an option where you can buy the developer's edition (it's called
something else, I'm not up on the terminology). This edition allows you to
develop an Access application, distribute it with the Access runtime to as
many separate companies as you wish.
HTH,
Immanuel Sibero