Outlook "Calendar" backup?

[Al Sterling]

My office is XP Home and company laptop is XP Pro. I've
searched the net for a simple program to "backup" my
Outlook Calendar. The only two programs I've found on
Google search are ABF and Novasoft, which are both
Russian based softwares? Is there a domestic backup
software...or does that violate Microsoft copyrights? I
need to simply backup Outlook Calendar on whichever
machine I'm using. What is the popular fix???

Thanks, Al in SoCal