KEYBOARD TYPES

KEYBOARD :- It is an input device which is used to give command are input signal. 

They are two types of key boards available

   Normal Keyboard – PS2 pin, Serial pin

 Multimedia Keyboard – USB pin

OBSERVATION PARTS MONITOR

OBSERVATION PARTS

MONITOR :- Monitor is also called as display unit. It is like a T.V. It is built by a plastic P.V.C cabinet. It will display with the help of C.R.T ( Cathode Ray Tube )

                           

TYPES OF COMPUTERS

5th GENERATION :- Laptop or Bio cells

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 

4.GENERATION V.L.S.I.C- COMPUTER

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

Advantages :-

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

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

3 .GENERATION: ITS Integrated circuits.

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

2nd GENERATION:COMPUTER ;Advantages

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.