I have a treo smartphone, and i want to copy all of my contacts onto my computer because i want to reset my OS

How do you backup all of your contacts onto the computer, like they do in Verizon or something when you get a new phone? because i want to change OS on my phone...I have a treo smartphone, and i want to copy all of my contacts onto my computer because i want to reset my OS
There are several online back up solutions for your Treo ( see list at link below )



That is probably the best way to do it.