Birling is a term used to describe the practice of politicians or businesspeople using their influence to gain advantages for themselves or their associates. ROLEOS is an acronym for 'Return On Lobby Expenditure Over Time', which is a measure of how successful a birling effort has been. LOG stands for 'Lobbying Of Government', which is the process of attempting to influence government decisions. Logrolling is a form of birling in which two or more parties agree to support each other's interests in exchange for mutual benefit.