Main Page | See live article | Alphabetical index A Union is a single entity which is a collection of two or more entities. Other references are: A mathematical concept: see union (set theory) The Northern side in the American Civil War A type of commercial entity: see union (commerce) A trade union (labor union) is a workers' organisation designed to assist in employment negotiation. A number of places in the United States of America: Union, Kentucky Union, Maine Union, Mississippi Union, Missouri Union, New Jersey Union, Ohio Union, Oregon Union, South Carolina Union, Wisconsin Union City, California Union City, Georgia Union City, Michigan Union City, New Jersey Union City, Ohio Union City, Pennsylvania Union City, Tennessee Union County, New Jersey Union Township, Michigan Union Township, New Jersey Union Township, Pennsylvania (not to be confused with places named Uniontown and Unionville) (There are also Union Beach, New Jersey and Union Springs, Alabama.) Union (computer science) data type Union, Saint Vincent This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.