How to find out which package version is loaded in R?

Question

I am in a process of figuring out how to use my university cluster. It has 2 versions of R installed. System wide R 2.11 (Debian 6.0) and R 2.14.2 in non-standard location.

Answer 1

GUI solution:

If you are using RStudio then you can check the package version in the Packages pane.