Storage

Your computer has one or more disk drives—devices that store information on a metal or plastic disk. The disk preserves the information even when your computer is turned off.

Hard disk drive

Your computer's hard disk drive stores information on a hard disk, a rigid platter or stack of platters with a magnetic surface. Because hard disks can hold massive amounts of information, they usually serve as your computer's primary means of storage, holding almost all of your programs and files. The hard disk drive is normally located inside the system unit.

CD and DVD drives

Nearly all computers today come equipped with a CD or DVD drive, usually located on the front of the system unit. CD drives use lasers to read (retrieve) data from a CD, and many CD drives can also write (record) data onto CDs. If you have a recordable disk drive, you can store copies of your files on blank CDs. You can also use a CD drive to play music CDs on your computer

Parts of a computer

If you use a desktop computer, you might already know that there isn't any single part called the "computer." A computer is really a system of many parts working together. The physical parts, which you can see and touch, are collectively called hardware. (Software, on the other hand, refers to the instructions, or programs, that tell the hardware what to do.)

The illustration below shows the most common hardware in a desktop computer system. Your system may look a little different, but it probably has most of these parts. A laptop computer has similar parts but combines them into a single notebook-sized package.

Desktop computer system

Let's take a look at each of these parts.

System unit

The system unit is the core of a computer system. Usually it's a rectangular box placed on or underneath your desk. Inside this box are many electronic components that process information. The most important of these components is the central processing unit (CPU), or microprocessor, which acts as the "brain" of your computer. Another component is random access memory (RAM), which temporarily stores information that the CPU uses while the computer is on. The information stored in RAM is erased when the computer is turned off.

Almost every other part of your computer connects to the system unit using cables. The cables plug into specific ports(openings), typically on the back of the system unit. Hardware that is not part of the system unit is sometimes called aperipheral device or device.

MOUSE :- Mouse is also an input device.

                              

They are different types of mouse available

1.      Two button

2.      Three button

3.      Scroll button

PROCESSOR :- A processor is the logic circuitry that responds to and processes the basic instructions that drive a computer.

                                        

They are two types processors available

1.      Slot processor

2.     Chip processor

MOTHERBOARD :-  The motherboard is a printed circuit that is the foundation of a computer and allows the cpu, ram and all other computer hardware components to function with each other

1.     MICRO FRAME COMPUTERS :- Micro frame computer is nothing but desktop piece  FOR EXAMPLE– laptops

HARDWARE

Hardware :- Hardware is a physical device which we can view or face the trouble shoot’

HARDWARE PARTS

1.                 Monitor

2.                 Key Board

3.                 Mouse

4.                 Processor   - C.P.U. ( Central Processing Unit )

5.                 Mother Board

6.                 RAM ( Random Access Memory )

7.                 C.D. Rom ( Compact Disk Read Only Memory )

8.                 Speakers

9.                 Printer

10.                       Scanner

11.                       Web Cam

12.                       Voice chat or Head Phone

13.                       D.V.D. Writer ( Digital Versatile Disk )

14.                       D.V.D. Rom ( Digital Video Disk Read Only memory )

15.                       C.D. Writer ( Compact Disk )

16.                       S.M.P.S. ( Switch Mode Power Supply )

17.                       Hard Disk

18.                       Floppy Disk

19.                       Cabinet

20.                       Graphic Card

21.                       Fax

1.      It occupy minimum space

2.      Minimum 2 or 1 hardware engineers

3.      The system works life long

DISADVANTAGES:-

1.      Current power waste

2.      It’s duration era 1975 to 1995

5^th GENERATION :- Laptop or Bio cells

Advantages :-

1.       It occupy a slate space

2.      Minimum one hardware engineer

3.      The system work life long

4.      It’s duration era 1995 onwards

TYPES OF COMPUTERS :-  Totally they are four types of computers. They are-

1.      Super computer

2.      Main frame computer

3.      Mini frame computer

4.      Micro frame computer

1.     SUPER COMPUTERS :- It is  highest computer having a good configuration

FOR EXAMPLE- Rockets or etc

2.     MAIN FRAME COMPUTERS :- Main frame computer is a highest computer having a good configuration like P4 systems

FOR EXAMPLE- USES- This system are used in banks, hotels, school, collages and institutes   

3.     MINI FRAME COMPUTERS :-  Mini frame computers is used up to specific task like D.N.S ( Domain Naming System ) and D.H.C.P ( Dynamic Host Configuration Products )

        FOR EXAMPLE- This systems will used up to limited networking 

  2^nd  GENERATION:   In 2 generation there was transistors.

Advantages:

 Batter then first generation.

1. It occupy a half space.

2. Normal heat was generated.

3. Minimum 4 or 5 hardware engineers.

4. The system works for few months.

Disadvantages:

1.      A/c Requirement.

2.      Current waste.

3.      Money waste.

4.      Its derision era 1955 to 1965.

3 .GENERATION: ITS Integrated circuits.

1.      It occupy quarter space.

2.      Minimum 3 to 4 hardware engineers.

3.      The system works for few years.

DISADVANTAGES :-

1.      Normal heat was generated

2.      A/C requirement

3.      Current waste

4.      Money waste

5.      It’s derision era 1965 to 1975

4.GENERATION  V.L.S.I.C ( Very Large Scale Integrated Circuits )

Advantages :-

 Better than 1^st  and 2rd  are 3^rd generations

BASICS- FCC- FUNDAMENTAL COMPUTER CONCEPTS

C = Commonly.

O = Operated.

M = Machine.

P = Particularly.

U = Used for.

T = Technical.

E = Education and.

R = Research.

DEFINITION OF COMPUTER:

Computer is an electronic deride which taken the data store. It process it and gives the result finally its stored in its memory its information is very speed .

GENERATIONS OF COMPUTERS:

To tamely there are 5 generations.

1^st GENERATION: In 1 generation there are 18,000 vacuum tubes.

Advantages:

1.    It occupy a lot of space.

2.    Very big heat was generated.

3.    A/c – Requirement.

4.    Current waste.

5.    Money waste.

6.    Minimum 6 or 7 hardware engineers.

7.    The system works for few days.

8.    Its derision era 1945 to 1955.