The hardest part for people to intuitively grasp is the odd notion that you have to invite the room to a meeting, along with the people.
Resources can include overhead projectors, cars, the company plane, the pool, and more.
But the most common kind of resource is conference rooms. Depending on your luck, you could be inviting Toto, Bud Light, or Al Gore to your staff meetings. Happily, the resource owner does not have to spend all day fielding requests for the room. Owners can select to receive notification of appointments for the resource. They can also create a rule to automatically accept or decline appointments for a resource.