This section presents some unexpected uses of commands, gives examples of
sequences and discusses some performance issues.

       UNIX to DOS                 
       DOS  to UNIX                
       Turn File Upside-Down       
       Search Double ESC           
       Speed Optimization          
       Protect Input-file          
       Switch Off Unwanted Argument
       Move to End of Word         

NOTE: saving and restoring of used registers is usually not included. It
      tends to make the examples less legible, and since it is not always
      required it was omitted most of the time.