my do people study computer

Are you talking about the benefits of being A+ certified? Well, to be honest, that used to be the way to go if you want to enter the IT world and computers. Most companies required at least that to work at a help desk. Now, however, it's basically worthless. There are so many people out there that have A+ certification that it's meaningless. I would try something more advanced like networking if you want to get into the IT field.