The main computer is a Dell Dimension connected to a Belkin Wireless Router/Modem. This computer is also connected to a HP Laserjet 4+ connected by parallel, and an HP Officejet G85 all in one, connected by USB.

The second computer is my Dell laptop, connected via the Belkin router/modem and accessing the printers and shared files via the wireless network.

The third computer is the Apple mac G4 with an airport wireless connection that can access the internet etc via the wireless network but can't print or share files.

To be fair, I'm so busy that I haven't done any great deal of exploring why? However, I have no experience of Macs and some of the terminology is even more foreign to me than the terminology around PCs!!!