COSE

COSE or CoSe may refer to:
 * Common Open Software Environment, a 1993 Unix initiative
 * Council of Smaller Enterprises, a business advocacy organization in Northeast Ohio
 * Carbonyl selenide, a chemical compound with the formula COSe
 * Cobalt(II) selenide, a chemical compound with the formula CoSe
 * CBOR Object Signing and Encryption, security standards for the CBOR data format