Preferred provider organization
In health insurance in the United States, a preferred provider organization (PPO), sometimes referred to as a participating provider organization or preferred provider option, is a managed care organization of medical doctors, hospitals, and other health care providers who have agreed with an insurer or a third-party administrator to provide health care at reduced rates to the insurer's or administrator's clients.
Tree preservation order
A tree preservation order (TPO) is a part of town and country planning in the United Kingdom. A TPO is made by a local planning authority (usually a local council) to protect specific trees or a particular area, group or woodland from deliberate damage and destruction. TPOs can prevent the felling, lopping, topping, uprooting or otherwise willful damaging of trees without the permission of the local planning authority, although different TPOs have different degrees of protection.