A QlikView license is referred to as a Client Access License (commonly called as CAL). To access the QlikView Dashboards deployed in QlikView Server, users need a Client Access License (CAL). The CALs are purchased with QlikView Server and tied to the QlikView Server Serial Number. A CAL is never transferred to a client, but a client uses the CAL when connecting to the server or, if a cluster license is used, a specific QlikView Server cluster. CALs cannot be transferred between different QlikView Server clusters. Developers can work with the QlikView documents by leasing a license from the Server.