THE FIVE TYPES OF COMPUTERS

 

Day  6 Lesson Notes to be WRITTEN in YOUR JOURNAL:

 

    Companies/people pick a computer based on what they NEED to do. 

    Price can be an issue since some of them are $100,000. 

    If you get one that’s more powerful than you need, it’s a WASTE OF RESOURCES for a company.

    WHY would anyone or any computer ever spend more than $100 million dollars on a computer?

    What “special effects” have you seen in movies?

 

  1. Mainframe           and  

-          first type of computer used by government and businesses

-          multiple tasks for many users simultaneously

-          Large corporations

-          Climate controlled rooms

-          Hook-up to it through personal computer

-          Examples – government agencies accessing social security numbers/info

-          National car rental company access info on anytime/where you have ever rented a car

-          Credit card companies’ customer service

 

  1. Supercomputer    AND

-          Processes trillions of calculations per second

-          Weather forecasting

-          Crash testing

-          Special effects in movies

-          $100 million

-          Why do people spend this much on a computer?  - save lives or will make more than it cost

 

  1. Minicomputers     AND

-          Popular in the 70’s and 80’s

-          Small to medium size companies

-          Schools and small office companies (less than 100 people)

-          Less than $100,000

-          Now that PCs are so powerful, these are becoming OBSOLETE

       

  1. Professional Workstation    and

-          Need more power than a pc

-          Rapid processing and relatively low cost

-          Scientist, graphics, financial analyst, architects

-          $2000-$9000

-          Now that PCs are so powerful, these are becoming less necessary

 

  1. Personal Computers     and

-          Exploded in the early 80’s

-          Cost is always decreasing

-          Use to have a lot of “types” – now Apple and IBM – compatible (Apple good for media)

-          Rapid processing and relatively low cost

-          Scientist, graphics, financial analyst, architects

-          $2000-$9000