(computing) A programmable device that performs mathematical calculations and logical operations, especially one that can process, store and retrieve large amounts of data very quickly.
An item the user can select in the Options dialog box, Phones tab, from the "Select the default device for calling phone numbers" drop-down list. When the user selects Computer as the default device for calling phone numbers, Communicator uses the Voice Over Internet Protocol (VOIP) connection for making a call.