Storage Device

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                                                  Chapter 3            Lesson Overview Human beings store the information in their mind (memory of humans). Likewise, computer store information in its primary and secondary memory (memory of computer). They both can recognize it in the time of need. The physical parts of a computer that stores information and data either permanently or temporarily are called storage devices. They are classified as removable and non-removable storage devices. Computer memory is divided in to two parts. They are: 1.    Primary Memory 2.    S...
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Types of Computers

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                                                                       CHAPTER 6

TYPES OF COMPUTER

…    

Class- 4 and 5

Lesson Overview

As we know that, we are living in that world that always develops according to the people requirement. It develops the same thing or invents a new thing. Likewise, computers are also developing according to the people’s requirement. Example: - when people required a small mobile sized computer with all the functions then, a mobile sized computer called palmtop computer was developed.

Some other types of computer are discussed below:-

         i.            Digital Computer

        ii.            Laptop

      iii.            PDA (Personal Digital Assistant)

      iv.            Super Computer

    v.       Analogue Computer

   vi.       Hybrid Computer

Digital Computer

Digital computers are the most popular general purpose computers. They work with separate data that can be in any form like numbers, letters, figures and other symbols. They can only understand binary numbers i.e. 0 and 1 and use these numbers only to represent all form of information internally in digital form.  It is divided into four types on the basis size, processing speed, etc. They are:

      i.            Micro Computer

  ii.            Mainframe Computer

iii.            Mini Computer

iv.            Super Computer

 


Laptop

Laptops are medium sized, light weight computer that contains the CPU, mouse (in the form of touchpad) keyboard, etc. all attached in one. It is also known as Notebook Computer. They can run with both battery and electricity. The batteries of laptop are fixed inside the laptop only. Companies like Dell, Lenovo, HP, Samsung, Sony, etc. makes laptop.

 

PDA - Palm is an American technology company that developed and designed PDAs, mobile phones and software. A personal digital assistant is a variety mobile device which functions as a personal information manager. It is also known as handheld computer. It can be stored in a pocket and used while you’re holding it. This computer was founded by Jeff Hawking in 1992. Example:-Palm Pilot, Palm TX, Palm IIc (the first Palm with color screen), etc. 

 


Super Computer

Super computer is a type of digital computer that can perform millions of task in a fraction of second and it is most expensive computer. They have a large storage capacity and very high processing speed. This type of computers has more than one thousand CPU (Central Processing Computer). It is used in weather forecast, robot designing, etc. They are one of the advanced computers in computer family. Example:-NEC- 500, CYBER 250, CRAY- XMP, etc.

 

 


1.   Fill in the blanks.

a.   _________computer is a type of digital computer.

b.   _________computers can understand only understand binary numbers.

c.    The computer that can be fitted in our palm is called ______computer.

d.  ________computer can run with both electricity and battery.

e.    ________is the most advanced computer in the computer family.

 

2.   Answer these questions:-

a.   What do you mean by types of computer?

b.   What are the types of digital computer?

c.    Write the name of companies that makes laptop.

d.  What are the examples of super computer?

e.    What is a digital computer?

f.     What is a super computer?

g.   Which is the first color screen PDA?

 

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