heh, i know a guy that will be having rage-fits of the use of "on-Premise" on their web site...

Premise:

noun /ˈprɛmɪs/ LOGIC a previous statement or proposition from which another is inferred or follows as a conclusion. "if the premise is true, then the conclusion must be true" verb /prɪˈmʌɪz/ base an argument, theory, or undertaking on. "the reforms were premised on our findings"

Premises:

noun a house or building, together with its land and outbuildings, occupied by a business or considered in an official context. "the company has moved to new premises"