A Connector is software that connects one application to another to exchange data and provide functionality, usually through an API (ApplicationProgrammingInterface) for each application program.

Most modern connectors use Web Services technology (e.g., XML-RPC? and SOAP?), which is replacing the older CORBA and DCOM protocols for calling remote application services in a Services Oriented Architecture?.

Also known as an adapter. When there is a conversion of the data format, connectors may be called converters.