NY most commonly refers to:
Nylon is a generic designation for a family of synthetic polymers, based on aliphatic or semi-aromatic polyamides.
In the field of digital signal processing, the sampling theorem is a fundamental bridge between continuous-time signals and discrete-time signals.
Nystagmus is a condition of involuntary (or voluntary, in some cases) eye movement, acquired in infancy or later in life, that may result in reduced or limited vision.
Nymphomaniac (stylised as NYMPH()MANIAC onscreen and in advertising) is a 2013 European two-part art film written and directed by Lars von Trier.
Nynorsk (translates to "New Norwegian") is one of the two written standards of the Norwegian language, the other being Bokmål.
NYPD Blue is an American police procedural drama television series set in New York City, exploring the struggles of the fictional 15th Precinct detective squad in Manhattan.
NYC Ferry is a network of ferry routes in New York City operated by Hornblower Cruises. As of August 2018, there are six routes connecting 21 ferry piers in the Bronx, Brooklyn, Manhattan, and Queens.