What versions of the Intel compilers are available?
Version 11.1 is current the default for the Intel compilers. You don’t need to do anything special to use it. Older versions are sometimes installed for special purposes, especially during the transition to a new version. Use the module avail command to see what modules are available. For example, if the module module avail command shows that the icc/10.1/default module is available, then you could use of icc version 10.1 by loading it with the module load icc/10.1/default command at the beginning of your session.