Since I work in two libraries, one would think I have the opportunity to work with a lot of patrons and their computer troubleshooting.  That is not so, most of my time is spent either archiving materials or organizing them.  The librarians handle the computer troubleshooting. One day I did find myself sitting at a computer terminal trying to explain to an elderly woman how to right click on an icon.  Her mind was one a five minute loop, because she kept coming back to me asking how to right click with the mouse again and again.  I know you have to be patient and respectful to the elderly, but where is the fine line between annoyance and patience drawn?