COMPUTER PERIPHERALS

SOME COMPUTER PERIPHERALS

All the parts connected to the computer internally or externally are calle dthe computer peripherals .-MONITOR:It is also called as screen,it is like a tv screeen,which is displaying unit ,we can get different types of monitors ex. monochrome ,LCDtypes ,color types etc.KEYBOARD:It contains many keys ,it is the main input device ,all data and instructions are given through it, we can get different types of keyboard according to the no. of keys ,some keyboard has 101 ,some has 102 keys,some has 104 and others lates has the 105 keys ,it consists of numeric keys <0,1,2,3......9>,functional keys ,arrow keys (<-,->,...>,charactersand additional keys .CPU The full form of the cpu is central processing unit ,it is the main part of the compute ,so it is known as the heart of the computer ,it is very expensive than the monitor or keyboard ,it consists three sections: CPU
ALU
CU
MU
ALU
This unit is most important unit for data processing ,it acts as airthmetic operator a nd coparative operator ,all te logical and mathematical operations are processed on this unit.
arithmetic operator are+,-,*.....
comparative operator are=,>,<,>=,<=
CU
This unit contros the overall process of the CPU,this section interprets the data and instructions and gives to other components ,it controls the overalls processings unit ,this unit helps to control computer peripherals as well as the working process of the computer .
MU
This is brain of the cpu ,thousands of data nd instructions are stored on this unit given though the input devices ,in the early stage computer ,vacuum tubeswere used as memory device,william shockley and his two freinds,john burden and walter h. brattain invented"transistors '.one transistor is equals to 1000 vacuum tubes ,at the 3rd generation ,hardwick johnson in 1953 invented the most important device called IC chips as the memory devices.