It's either in the licensing/user agreement that comes up during the install process, and is usually a document called license or registration (or something similar) with most software in that software's main install folder. You may find info in the menus somewhere for that program. (I see a license under the Help menu in Safari, for example) Or look in the box when the software is purchased. If you cannot determine the status, how about contacting the publisher for determination, or just assume it is single user/system. Software doe not normally come with a multi-install or site license, unless the purchaser chooses that as an option. Anything specific that someone might be able to answer?