Thiokol (variously Thiokol Chemical Company, Morton-Thiokol Inc., Corant Technologies Inc., Thiokol Propulsion, AIC Group, ATK Thiokol; currently ATK Launch Systems Group) is a U.S. corporation concerned initially with rubber and related chemicals, and later with rocket and missile propulsion systems. Its name is a portmanteau of the Greek words for sulfur (Θειο "theio") and glue (κολλα "kolla"), an allusion to the company's initial product.