So we have 3 computers and 3 different Zunes all sharing the same account for $14.99.

For home users, the main attraction is that several computers can easily share a single broadband Internet connection.

One is simply providing connections so that the many computers on multiple networks within an organization can all share files and data.

Second, a network lets your computers share information.

Then you need a router so your computers can share the connection.

That way, many computers can share a few public IP addresses.

This way, multiple computers can share a single public address.

The computers share the same wires as the phones but operate at a different frequency that does not interfere with voice traffic.

Collectively, lesser-powered computers can share the load and provide redundancy.

Such caches are used in systems where many processors or computers share the same memory and each have their own cache.