"you'll enjoy wired or wireless Internet access for all your computers and be assured of protected communications on your home or small office network!" Netgear
I have a wireless router, and yes, you can run lot's of computers with it.
Some are wired, some are run using the wireless.
I use a code so neigbors can't log onto the network.
It's kind of cool to use a laptop in the living room, and be able to print out on the office printer.
All of the computers can print from the same printer.