There are group virtual channels, where groups of mobile and hand held radios are addressed based on their "system" and "group" (virtual channel selector) setting. On a commercial system, a typical group might be a small business such as a towing company. On a government system, a typical group might be a group of people in a department with similar tasks such as the city street department. When any user in the group talks, all radios with their selector set to that group meet on a virtual channel and can communicate. When the conversation ends, radios immediately begin a search for another call.