A nanny is a person who provides child care. Typically, this care is given within the children's family setting. Throughout history, nannies were usually servants in large households and reported directly to the lady of the house. Today, modern nannies, like other domestic workers, may live in or out of the house, depending on their circumstances and those of their employers. Some employment agencies specialize in providing nannies, as there are families that specifically seek them and may make them a part of the household.