Profile: Bus-Tech, Inc. is a developer of mainframe channel emulation technology. We connect open system storage arrays to mainframes in support of virtual tape and 3390 emulation. Our mainframe data library is a family of virtual tape library controllers for IBM compatible and Unisys 2200 mainframes. Our zDASD is an emulation product that stores and retrieves files implementing the ECKD file access method on common, open system storage arrays.