In comparison with OS X, Mac OS 8 and 9 were tiny and simple. Installing or replacing a component was a minor task; here is how we did it.
Mac history
With Mac OS 8 and 9 back in 2001, we had to performance routine maintenance to keep the Desktop working. This is how we did it.
Step-by-step instructions for setting up a dial-up Internet connection under Mac OS 8 or 9.
The Eclectic Light Company 