IOSS

IOSS can refer to:


 * Import One-Stop Shop, an electronic portal for declaration and payment of value-added tax when importing goods into the European Union
 * Input/output subsystems, see for example Cray Y-MP
 * Interagency OPSEC Support Staff, a U.S. government consultant to other U.S. government departments or agencies
 * International Orchestra Safari Sound, a former Tanzanian band from 1985 to 1992
 * Investigations & Operations Support Section, a branch of the American Federal Bureau of Investigation