MGUs can perform many tasks that are normally performed by insurers, such as appointing retail agents, underwriting insurance, binding and issuing policies, collecting premiums, and claims management. MGUs are typically used for specialty lines of insurance, such as professional liability and cyber insurance, and operate in the surplus lines marketplace. The terms managing general underwriter (MGU) and managing general agent (MGA) are used interchangeably; though, historically, MGAs were more involved in claims than were MGUs.