Introduction to Computer:-  

               The word 'COMPUTER ' comes from the word 'COMPUTE'. Which means "TO CALCULATE" so, a computer is normally consider to be a calculating device that can speedily perform Arithmetic and Logical Operation. 

 "कंप्‍यूटर के हिंदी में कई नाम हैं, कंप्‍यूटर गणना करता है इसलिये इसे संगणक (SANGANAK) कहते हैं, यह कंप्‍यूटर का सबसे कॉमन हिंदी नाम है"

Computer full form :à

(Commonly operating machine particularly used for Trade (Technical) Education & Research)

                        

C	Calculation	सी - आम तौर पर           (गणना)
O	Operative	ओ - संचालित
M	Machine	एम - मशीन
P	Processing	पी- विशेष रूप से
U	Useful	यू- प्रयुक्त
T	Technical	टी - तकनीकी
E	Extensive	ई - शैक्षणिक
R	Research	आर - अनुसंधान

--> What is computer ?

                     Computer is an electronic device(machine) which takes the input from the INPUT device, stores in the MEMORY, PROCESS some operation on the data and display the result through the OUTPUT device.

fig- Basic Computer Operation

ØInput Unit:-

•A device that brings data into the computer.

•It accepts data and instructions from the user.

•For example :- Mouse, Keyboard, camera,   scanner etc.

Memory(Storage) Unit:-

•Memory is the location where data and instruction are stored.

•A means to store data and instructions permanently is known as storage.

•A means to store data for short or long term use.

•For example:-Long Term-Hard Disk, CD,DVD, floppy disk etc.

•Short term:- RAM

ØOutput Unit:-

•A device that presents data and /or information to the end user.

•It display (show) the result to user.

•For example:- Monitor , Speaker, Plotter, Printer etc.

ØProcessor:-

•A device for executing Programmed instructions.

•A Process is the operation of data as per given instruction. It totally internal process of the computer system.

•This is the CPU(Central Processing Unit)

•CPU include three parts they are as follows-

1.ALU

2.CU

3.Register

ØOutput Unit:-

•A device that presents data and /or information to the end user.

•It display (show) the result to user.

•For example:- Monitor , Speaker, Plotter, Printer etc.

ØProcessor:-

•A device for executing Programmed instructions.

•A Process is the operation of data as per given instruction. It totally internal process of the computer system.

•This is the CPU(Central Processing Unit)

•CPU include three parts they are as follows-

1.ALU

2.CU

3.Register

ØALU(Arithmetic Logical Unit):-

•It contains an electronic(digital) circuits that can performs all arithmetic (addition, subtraction etc.) and logical operation( AND -&,OR-II, NOT-!).

ØCU:-

•Control unit is most important part which controls all the internal as well as external function in the computer.

•It also directs the change of data and instructions between memory unit and ALU.

ØRegister:-

•Registers are temporary storage which are responsible for holding the data that is to be processed.

•They store the instruction and data in a processor.

•This data further used by control unit.

•Register are not the part of main memory. 

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Tarun Sir

Thanks to all ,  for visit here.

Next Topic :- "Computer Generation"