Subdivision is the act of dividing land into pieces that are easier to sell or otherwise develop, usually via a plat. The former single piece as a whole is then known in the United States as a subdivision. If it is used for housing it is typically known as a housing subdivision or housing development, although some developers tend to call these areas communities. Subdivisions may also be for the purpose of commercial or industrial development, and the results vary from retail shopping malls with independently owned out parcels, to industrial parks.