On the other hand, Keynesian economists believe that markets react very slowly to changes in equilibrium (especial to changes in prices) and that active government intervention is sometimes the best method to get the economy back into equilibrium.
Computer science. Computer science is the study of how to manipulate, manage, transform and encode information. There are many different areas in computer science. Some of the areas consider problems in an abstract way. Some areas need special machines, called computers.
Computer science students focus on software. By hardware I mean computer engineering students learn how to build parts of or an entire computer. They study all the computer components: the networks and how they talk to each other and how to make a better computer chip -- these are hardware areas.