MSY

MSY or msy can mean:


 * Maximum sustainable yield
 * IATA airport code for Louis Armstrong New Orleans International Airport
 * Merseyside, county in England, Chapman code
 * The Mount School, York, United Kingdom
 * Motor sailing yacht, a ship prefix for a yacht that can use a motor for propulsion and also sail
 * Mulayam Singh Yadav
 * Million Species Years, a measurement of Background extinction rate