Nothing built in. Depending on what you mean by tracking changes, you'll
either need to code it yourself, or get a 3rd party add-in.
If what you're looking for is details of changes made to the data (i.e.: you
changed an address for a particular customer, or you marked an item as being
unavailable), check out Allen Browne's "Creating an Audit Log" at http://members.iinet.net.au/~allenbrowne/AppAudit.html