So you only have a pocket (1)_____to do addition, multiplication and so on, you want to know about real (2)_____? Right. Well, the machines themselves are called the (3)_____ and the programs that you feed into them are called the (4)_____. If you want to see the results of what you are doing, you’ll need a (5)____or you’ll have to plug into a television set. You’ll operate your machine like a typewriter by pressing keys on the (6)______. If you want to record on the paper of what you are doing, you’ll need a (7)______. On the rear panel of the computer there several (8)_______into which you can plug a wide range of (9)______-- modems, fax machines and scanners. The main physical units of a computer system are generally known as the (10)______.