:Category:Independent Subway System
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This category includes topics that relate to New York City's Independent Subway System formerly known as the Independent City–Owned Subway System (ICOS) and the Independent City–Owned Rapid Transit Railroad.
Category:Transportation in Queens, New York
Category:Transportation in the Bronx
Category:Transportation in Manhattan
Category:Transportation in Brooklyn
Category:History of transportation in New York City
Category:Wikipedia categories named after transportation companies of the United States