closed system



  • Any heating or cooling system in which the circulating medium is not expended, but is recirculated through the system.


  • A system whose technical specifications are not made public. In computers, for instance, this discourages third-party vendors from developing compatible products. This contrasts with an open system, in which technical specifications are made public

Human Resources

  • noun a work system which is inflexible and does not allow the employees much freedom to work in their own way