## Exercise 3

 1. This is a simple exercise for pipes. It is also interactive: you do not
    need to write a script.
 2. Perform the following tasks:
    
    ◦ make a copy of ‹oslist.csv›
    ◦ look at the content using ‹cat›
    ◦ print names (and only names) of all operating systems made by Apple
    ◦ print vendors of all microkernel operating systems
    ◦ print names and vendors of operating systems sorted by year
    ◦ erase your copy of ‹oslist.csv›

Now let's move on to the final exercise for today. What to do is described in
‹4.txt›.
