Go to Apple's website and dig down in the downloads
section - they've got
(or did have last year) all versions of MacOS from v1 up to 7.5. The
software license normally says that if you own a Mac you can download the
OS. If they haven't got older versions any more I've got 'em all here :)
Last I checked, they removed all except for System 6.0.8 and System 7.5.3.
The do have updaters for most of the systems, but they are just updates
that need the original system to run.
Once upon a time their FTP site did have a number of the pre System 7
versions (not all, but a handful of assorted versions). But I don't think
they have ever had full installs of anything but System 7.5.3 in the 7.x
and up range (and 7.5.3 should REALLY be updated to 7.5.5 as soon as it
is installed... .3 has a ton of bugs in it that are fixed in .5). System
7 is when they went to a paid OS model, so they didn't give the stuff
away. 6 and under their policy was you should go to your local Apple
dealer with blank disks and they will give you the latest OS version (at
least that is what they told me when I asked once how to get an update to
6.x)
-chris
<http://www.mythtech.net>