What else are pen drives used for?

On V1_5 and older machines pen drives are also used for installing updates/patches to system software, while configuration and networking information are stored on our PPM (“Portable Personality Module”) flash card.

With Version 2_0 and later machines, the PPM is no longer used and pen drives are used for back up and recovery procedures like updating configuration files (see the following two FAQs for more information).