NY most commonly refers to:
Nymphomaniac (stylised onscreen and in advertising as NYMPH()MANIAC) is a 2013 European two-part art film written and directed by Lars von Trier.
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 (often called "analog signals") and discrete-time signals (often called "digital signals").
Nystagmus is a condition of involuntary (or voluntary, in rare cases) eye movement, acquired in infancy or later in life, that may result in reduced or limited vision.
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 (originally called Citywide Ferry Service) is a network of ferry routes in New York City operated by Hornblower Cruises.
NYSE Euronext, Inc. was a Euro-American multinational financial services corporation that operated multiple securities exchanges, including the New York Stock Exchange, Euronext and NYSE Arca (formerly known as ArcaEx).
The Nyingma tradition is the oldest of the four major schools of Tibetan Buddhism (the other three being the Kagyu, Sakya and Gelug).