High Quality Content by WIKIPEDIA articles! HooX (Host object oriented conneXion) is a software product line allowing communication between mainframes and applications running on the Java EE or .NET frameworks. The product was announced in 2001 and its general shipping availability in 2002. The mainframes must run the GCOS 7, GCOS 8 or MVS operating systems. It is based on the GCOS TCP/IP Enterprise Access library.