Most modern operating systems have very nice tutorials that explain how to use the system. Run a tutorial and go through the steps. If you are in Windows 95 choose help from the start menu. If you are in Windows 3.1, choose Help With Windows from the program manager help menu. In the Macintosh world, find a file like "Getting started with Macintosh". Your instructor will help you find the correct tutorial. (To a point.... You are pretty clever at this stuff now!)