What is pledge payable?

This question actually caught my attention. The term payable is something a company "owes" but has not yet paid. Pledge, I am gathering, would be literally a "pledge" to pay a certain amount to perhaps a Charity or some other cause.

Many Charities have "Pledge" drives to raise money and occasionally companies make "Pledges" to donate a certain amount. If they record this in their books as a payable, it's safe to assume that they "PROMISE" or "PLEDGE" to donate this amount and are recording it in their books as a Payable.