in hasp ii v3, nih created the shared spool capability for hasp that was used by many mainframe sites. it allowed each hasp system to share a common spool and checkpoint. this enabled workload balancing in a multi-mainframe environment. in hasp ii v4, don greb and dave miko of mellon bank moved shared spool to this version and carried it forward into jes2 multi-access spool (ibm's formal support of hasp in mvs). over 350 copies of the hasp ii v4 shared spool mods were distributed around the world. the shared spool mellon mods were added to the share distribution process so they could be more widely accessed.