Difference between SharePoint 2010 standalone – server farm

When I was referring Microsoft link for installing PowerPivot on single server, I caught up with two different SharePoint 2010 installation type

1) standalone install 2) server farm install.

So I was curious to see what are the differences between these two options, Here is good TechNet link which talks about differences between two version while installing SharePoint 2010

http://social.technet.microsoft.com/Forums/en/sharepoint2010setup/thread/d24db2bf-40ee-42b8-9bbc-bd4d9ae41e16