We use Outlook at the community college where I work, and I keep my data files on a flash drive so I have access to my .pst files on all the various work stations. However, some of our labs don't have Outlook for security reasons. When I work in those labs or access exchange from home, I don't have access to my .pst files. Is there any way to open those .pst files if Outlook is not installed on a computer?

No. PST files require Outlook. Simon.Simon Butler, Exchange MVP Blog | Exchange Resources