My first contact with Mac OS was version Mac OS X 10.3 "Panther". I have always upgraded my main machines to the latest OS and so I'm familiar with every version since 10.3.
But I have never used anything before Mac OS X. So this was quite new to me and therefore I had some trial and error to get certain things working.
Since some old computers can only run certain versions of Mac OS, I created this section to list all the useful information I came across.