CTO may refer to: Occupations Chief technology officer, an executive officer in an organization focused on scientific and technological issues Chief Technology Officer of the United States Certified Television Operator, an operator certified by the Society of Broadcast Engineers Organizations Cape Town Opera, South African opera company Caribbean Tourism Organization, for sustainable tourism Commonwealth Telecommunications Organisation, a partnership between Commonwealth and non-Commonwealth governments, business, and civil society organisations Cyprus Tourism Organisation, a semi-governmental organisation in Cyprus CTO Hospital (Turin), a major medical center in Turin, Italy Other Cancelled-to-order, a postage-stamp cancelled by the postal administration before sale to stamp-collectors Activated carbon filter to improve Chlorine, Taste, Odor Chronic total occlusion, a disease of a coronary artery of the heart City ticket office for an airline Color temperature orange, a type of color gel filter used in color correction Community treatment order, an implementation of mental-health law in Australia, England and most provinces in Canada See also Central Treaty Organization (CenTO), a former intergovernmental military alliance