One of the features that I like about PCs is the fact that I can use shortcuts to open various programs, and perform various tasks without using my mouse. In a room where there are many computers, mouses can be quite annoying. I do not have anything against mouses, but for some people it is difficult to concentrate on performing their tasks when there are many people in a room clicking on mouses. That is especially true if people are clicking on mouses repeatedly within a short interval of time. Many believe that if you learn how to perform so many tasks by using a keyboard, then your productivity might get higher. That is why using shortcuts might be a good idea.