How do the computer work (Avengers)

1.  How do the computers work?
-  Back in the 1940s, Thomas Watson, boss of the giant IBM Corporation, reputedly forecast that the      world would need no more than "about five computers (Active)
- Six decades later and the global population of computers has now risen to something like one billion machines! (Passive)
- To be fair to Watson, computers have changed enormously in that time (Passive)

2. What is Computer
-  A computer is an electronic machine that processes information—in other words, an information processor: it takes in raw information (or data) at one end, storesit until it's ready to work on it, chews and crunches it for a bit, then spits out the results at the other end (Active )
-  She puts this in an envelope addressed to the person who sent her the original problem and sticks it in her out tray, ready to post. (Active)
- Taking in information is called input,storing information is better known as memory (or storage), chewing information is also known as processing, and spitting out results is called output. (Passive)
- It works amazingly hard and gets incredibly hot in the process.(Active)

3    3. What is a computer program?

       - Today, computers work on a much wider variety of problems—but they are all still, essentially, calculations. (Active)

        - The computer stores each pixel as a number, so taking a digital photo is really like an instant, orderly exercise in painting by numbers! (Active)

         -  Hardly anyone writes programs any more.(Active)

      4. What's the difference between hardware and software?

       - The beauty of a computer is that it can run a word-processing program one minute— and then a photo-editing program five seconds later. (Active)

        - This is why programs are also called software.(Passive)

      5. What is an Operating System

    - That's the basic idea behind an operating system: it's the core software in a computer that (essentially) controls the basic chores of input, output, storage, and processing. (Active)

       - so it's known as firmware (it is usually designed so it can be updated occasionally, however). -> Passive