There are several aspects to software preservation, one of which is
preserving the contents of the physical media used to distribute
software before network distribution became the norm. For much older
software, especially games, media preservation is required to ensure
proper operation of the software. Even when it isn't required, it is
still a useful way to guarantee an unmodified copy of the software.
Floppy Disk Preservation
Floppy Disk Formats
Handling Macintosh Floppy Images
Case Study: Amiga Rogue
CD-ROM Preservation
Cdrdao Imaging Script
Kryoflux
Go here for more information on imaging disks with the Kryoflux and
for our archives of Kryoflux floppy disk images.
CD-ROM Images
Go here for images of CD-ROMs.

Off site links:
Kryoflux.com
REDUMP Disc Preservation Project