WSO

WSO may stand for:
 * Waltham Symphony Orchestra in Waltham, Massachusetts, United States
 * Washabo Airport (IATA airport code) in Washabo, Suriname
 * Weapon systems officer (or weapon systems operator), a flight officer in the U.S. Air Force, Navy and Marine Corps, and in the British Royal Air Force
 * Wheeling Symphony Orchestra in Wheeling, West Virginia, United States
 * Wichita Symphony Orchestra in Wichita, Kansas, United States
 * Winnipeg Symphony Orchestra in Winnipeg, Manitoba, Canada
 * World Safety Organization, an international professional association in safety
 * World Sikh Organization, a non-profit organization
 * White superficial onychomycosis, a fungal infection of the nail plate
 * WSO, a malicious web shell