insurance services office
Insurance Services Office. A nonprofit organization that provides analytical and decision-support services and tools to the insurance industry, including statistical, actuarial, underwriting, and claims data, and drafts of model insurance policy forms and coverage provisions. • The organization is composed of member insurers. It provides data and information to its members and also to nonmember subscribers, such as risk managers, insurance regulators, and self-insureds. — Abbr. ISO.