TUTOR.TECH.DEMO.sit is a Macintosh StuffIt archive that contains a DiskCopy 4.2 disk image file of a ProDOS 800k 3.5" bootable disk with the Apple II Tutor Tech v2.7 hypermedia and multimedia program Demo. It's intended for use with any of the Apple II or IIgs emulator programs for the Macintosh 68k and PPC. After you download it as a binary file to your Macintosh, use StuffIt Expander to unstuff it, then you can use Disk Copy 4.2 to make a real ProDOS 800k bootable disk for use with any of the Apple II models that can use a ProDOS 800k 3.5" disk or simply use the DiskCopy 4.2 disk image mounted as a virtual disk with any of your Apple II or IIgs emulators. The Tutor Tech v2.7 DEMO disk was converted from a PC Apple II emulator disk image file using Bernie ][ the Rescue v2.0.x to mount it on a Mac PPC and then converted to the standard DiskCopy 4.2 image file. It was also converted and saved as a ShrinkIt 800k ProDOS 3.5 bootable disk archive named TT.DEMO.SDK, that's available within this folder.