title: How to rewrite the function of a computer
body: <p>I am not sure if I have to put such a question in here but I think this place is more suitable for my problem  than any.If not,sorry for bothering.</p>
  
  <p>I want to ask how one can rewrite the functionality of a computer?
  For example, I want the computer to only perform a single job which is to show the user a page instead of the desktop and let the user see a list of items being renewed each second(configured with a native app) by just opening the computer.I want this for seniors that are not fond of technology,and I dont have any information about innerworks of a computer,so I'm asking out of curiosity and lack of knowledge.Is it a job for a computer engineer?</p>