Computer

C = Common (साधारण या genral)

O = Operating (नियन्त्रण)

M = Machine (जुगाड़ या युक्ति) - जो काम को आसान करे व समय बचाए

P = Particularly

U = Used in 

T = Trade (व्यापार)

E = Education (शिक्षा) &

R = Research (खोज या अनुसंधान)

Defⁿ - It is an electronic device by which we can solve all types of problem like mathematical (+,-,*,/,^), arithmetical(अंक गणित) (>,<,<>,=,#)and logical(तार्किक) problem (and, or, not, nand, nor, xor, xnor etc) very easly with full accuracy.

Electric

1. Use AC Current
2. Simple wiring, Take more power
3. Repairing possible
4. Generation Gap(loss data)use transformer

Electronic

1. Use DC Current
2. Critical wiring and take some power, here we can use diode, triode, transistor, Capacitor and  transformer etc
3. Replacement component
4. No generation gap use booster or amplifier

Data- collection of fact and figure are called data it is a raw material of computer.

Information –collection of data which is use full and meaning full are called information.

Input Device(उपकरण)    →      Process Device  →   Output Device (For More...)

Data                                     Computer                                 Information(Result)

Exp =8X4-2                               CPU                                              =30

Keyboard, mouse, mic                                                      monitor, printer, speaker  

Hardware -:  It is a physical component part of computer by which we can see and touch very easily are called computer Hardware

There are three parts

1. Input device
2. Process device
3. Output device  

Input Device-:  By which we can send data to computer.

    There are many types of input device.

1. Key board
2. Mouse
3. Mice
4. Scanner
5. Light pen
6. Digital camera
7. OMR
8. MICR
9. Touch screen
10. Digitizer
11. OCR
    • OCR
    • OBCR

1. Keyboard -:  It is type of input device by which we can send character data through typing to computer.

2. Mouse(Puch) -:      It is type of input device and pointing device by which we can create graphic,  chose option and play video game.

3. Mice -:           It is type of input device by which we can send voice data to computer.

4. Scanner -:  It is Type of input device by which we can scan our photo and send to computer.

5. Light Pen -: It is a type of input device and pointing device by which we can create graphic and choose option direct on the screen

6. Digital Camera -: It is a type of input device, by which we catch photo and save into memory(Memory Card) & send to computer through data cable

7. OMR (optical mark reader) -: It is a type of input device by which we can read mark data from the omr sheet. Computer analyze the sheet and give result  very quickly.

8. MICR (Magnetic Ink Character Recognition) -: It is types of input device by which we can read magnetic data from check number,  draft no,  passport no and credit card (Magnetic stick are debit card)

9. Touch Screen -: It is type of input device by which we can chose any option with the help of finger or stick when we choose option they give pick sound.

10. Digitizer (Graphic Tablet)-: It is a device by which we can create graphic picture with the help of light pen.

11. (a)  OCR (Optical Character Recognition) -: It is a type of input device by which we can read printing character.

        (b) OBCR (Optical Bar Code reader)-: It is type of input device by which we can read bar code from any product and send to computer.

Note-:

lllllllllllllllllllll

   12 5378  896

This is a Bar code .Bar code Mean information of product like rupees, product place, product name etc.