A graphical user interface used in a virtual media system for allowing a server computer to access objects on storage devices of a client computer. The present invention further relates to a vector comprising a nucleotide sequence encoding a chimeric polypeptide including such an heterologous ligand moiety and all or part of a natural poxviral surface polypeptide. The outer mark encloses a cross area that has two central axes. Then a determination is made regarding whether the callee requests that additional contextual information be obtained. The testing fixture can further include a heat sink and air ducts for controlling testing conditions. One embodiment of the present invention provides a furnace for heating a semiconductor processing chamber.