Hartford Steam Boiler Inspection and Insurance Company
The Hartford Steam Boiler Inspection and Insurance Company (HSB) is a global specialty insurer and reinsurer headquartered in Hartford, Connecticut. It was founded in 1866 and is the largest provider of equipment breakdown insurance and related inspection services in North America serving over five million commercial locations.
Source: Wikipedia — Hartford Steam Boiler Inspection and Insurance Company (CC BY-SA 4.0)