S/S

S/S may refer to:


 * A Ship prefix that identifies a vessel as steam powered Vessel
 * A common naming prefix for any Merchant vessel
 * S/S, an industry abbreviation in the fashion industry for Spring/Summer (as opposed to A/W (Autumn/Winter))
 * S/S, a medical abbreviation for Signs and symptoms
 * In clothing, refers to short-sleeved (as opposed to L/S (long-sleeved))
 * Solidification / Stabilization (S/S) with Cement, a method of management and reuse of contaminated waste.