What is HYPER.BXY? It's a GS/OS program to read HyperStudio stacks (hyperstacks) for those of us who have not bought Hyper Studio but would like to look at the stacks. Use ShrinkIt GS v1.1 to unshrink the HYPER.BXY archive. This will give you a disk archive. You then unshrink it to a disk. You can istall the disk contents a hard drive also if desired.