The most fine utility for your system, files, disk and hardware tests.
Some of the included test & repair suites are:
Memory RAM(Full memory & Free memory)
Memory VRAM (display & video card integrated memory)
Memory ROM (L2 and L3 if present)
Serial Ports (any serial port)
Sound
File Info
BundleBits
and several others...
The CD-ROM contains the bootable volumes (7.5.5, 7.6.1, 8.1, 9.0.4), installer, manual, disk images and the software itself.
Compatibility* Color-capable Macintosh computer with minimum 640x480 display.
* System software version 7.5.5 or later.
* Drive capable of reading CD-ROMs.
* Minimum 5 megabytes of RAM above that required by the OS.
* Hard disk drive.