Assuming you're networking, you can purchase a print server such as this or you can share the printer between the computers----> go here.



Dimension 8400
1 GB SDRAM
3.4GHz
160GB
Samsung CD-R/RW
Philips DVD+RW
Iomega HDD 80GB USB 2.0
Radeon X300
WinXP w/Service Pack 2
USR 8001 router
RoadRunner
Firefox browser

Dimension E510,P4,3GHZ
512MB DDR SDRAM
128MB ATI Hyper Memory Radeon X300 SE
160GB ATA Hardrive
WinXP Media Center
48X CD-RW /DVD Combo
RoadRunner
Firefox browser

If you have a computer that connects permanently to your wireless network/router, you can share your printer through it:

http://www.microsoft.com/windowsxp/using/networking/expert/honeycutt_july2.mspx

Your computer also needs to be on if you wish to use the printer.

 

Otherwise, unless your printer has a network adapter built-in, there are printer servers that you can add to connect your printer to the router without going through a computer.  For example:

http://www.linksys.com/servlet/Satellite?c=L_Product_C2&childpagename=US%2FLayout&cid=1114037289584&pagename=Linksys%2FCommon%2FVisitorWrapper

if your system is compatible, you can purchase a wireless adapter for your printer.

it also depends on the printer of course.  some won't work well or at all with print server adapters.  some work great.