Project On Computer Science

Jusco School Kadma

Name:Class: 9 'A'

Sumit Kumar

Con

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Sl. no. Topics

Sl. no. Topics

1 Acknowledgment 11 SMPS

2 Indroduction 12 Memory And Storage Devices

3 Input devices 13 Memory and Storage Devices (2)

4 Keyboard 14 Ports

5 Mouse 15 Cards

6 Bar Code Reader 16 Output Devices

7 MICR 17 Printer

8 Web Camera 18 Speaker

9 OMR 19 Monitor

10 Motherboard

Acknowledgment

I would like to express my special thanks of gratitude to my teacher Mr. Amrinder as well as our principal Ms. Jhumjhumi Nandi who gave me the golden opportunity to do this wonderful project on the topic “Computer Science”, which also helped me in doing a lot of Research and I came to know about so many new things I am really thankful to them.

Secondly I would also like to thank my parents and friends who helped me a lot in finalizing this project within the limited time frame.

Introduction

I.T. Involves processing of information by computer. 'A computer is an electronic device which performs numerical calculations and logical operations and produces information that are expressible in numerical as well as in logical form.'

Computer has marked its advancement and betterment in almost every sphere of our life. Its application in the field of communication has led to wonders and has resulted in the era of information technology.

Input Devices

Input Devices accepts instructions and data from the user and sends it to the CPU. There are various types of input devices. Some of them are:

KeyboardMouseJoystickScannerOMROCR

MICRLight PenMicrophoneLight PenMicrophoneBar code ReadersWeb cameraDigital Camera

Keyboard

Keyboard is mostly common input device. It is mostly used to type text and to send instructions to the computer. It looks like a typewriter machine but has several additional keys. It normally contains 101 to 106 keys. The keys can be used individually or in combination with other keys.

MouseMouse is a hand held pointing device which is represented by a pointer on the screen. The pointer moves as the mouse is moved. A mouse generally consists of two buttons and a scroll wheel on its top.

By clicking the mouse button, the user gives instructions to the computer.

Bar Code Reader Bar Code Reader is a popular scanning device which read the bar codes. Bar code consists of adjacent vertical black bars of different width.

Bars are used to represent different numbers. One can see the bar code on the back cover of this book as well. A bar code reader emits a laser beam which reflects with the bar code image.

MICRMICR is an input device which is used by banks for processing of cheques. In cheques, cheque number, name of the bank, branch code is printed with special kind of ink containing magnetic particles or iron oxide which is scanned, read and identified with the help of MICR and transaction is accordingly processes in the computer.

Web CameraA web camera is a video camera that feeds its images in real time time to a computer or computer network via USB, Ethernet, or WiFi.

The common use of web camera is the establishment of video links, permitting computer to act as videophones or video-conference stations.

OMR

OMR is an input device which can detect the marks on a paper. It is used to evaluate answer sheets in which selected answers are marked in dark circles. It is used to read the answers by sensing the marks made on the answer sheet.

MotherboardMotherboard is the main circuit board of a computer that lies in the CPU to which all the hardware parts are connected. It is in the form of a large printed circuit which contains sockets for attaching additional devices. Typically, motherboard contains slot for processor, BIOS, ROM, etc. and all the controllers required for standard peripherals.

SMPSSMPS is an electronic regulator component that receives electricity from the main power supply and the supplies appropriate power to the other component of the computer. It takes the required amount of electricity from mains or UPS and converts the AC current into DC current with required voltage.

Memory And Storage Devices

Memory in context to a computer system refers to the location of storage of information. The CPU stores the data in the memory/storage device that can be used or retrieved when required. During the course of execution of instructions, some intermediate results may be produced which are stored in the memory called buffer storage, till they are requied for further processing. 'Memory' receives instructions and data from the input devices and stores them till they are needed by other parts of the computer. Memory can be classified into two types:

Primary Memory Secondary Memory

Memory And Storage Devices

Primary MemoryPrimary Memory RAM ROM

Secondary MemorySecondary Memory Magnetic Disks

Hard Disk Optical Disks

CD DVD Bluray Disk

Flash Drive Pendrives Memory Stick

Ports

Ports are sockets that are used to connect external devices. Generally a desktop computer's motherboard consists of USB ports, serial port, parallel port, audio port, network port, modem port, monitor port, etc.

Cards

Cards are the devices that enable the user to configure or customize a computer to perform specific task or to enhance its performance. For example: A TV tuner card enables the user to watch television on a computer. These cards are attached to motherboard's PCI slots.

Output Devices

Output is the information obtained after the processing of data. The user receives the result through output devices. Output can be in the form of soft copy or hard copy. Some common output devices are:

PrinterSpeakerPlotterMonitor

PrinterPrinter is a common output device which is used for printing documents. Printer generates a hard copy of data or information. There are two categories of printer:

Impact PrinterLine PrinterCharacter Printer

Non-impact PrinterInkjet PrinterLaser Printer

SpeakerSpeaker is an output device that converts the electrical signals in to sound waves that we hear. In speaker electric current is supplied to the magnet that pushes the diaphragm of the speaker back and forth which creates pressure and vibration in the air and that produces sound. In computers, speakers can be attached internally or externally.

PlotterPlotter is an output device that helps in creating high quality graphics, visuals, charts, graphs, tables and diagrams, etc. In plotter the figures are drawn by an electronic pen which is driven by a monitor. Plotter can be classified into four categories:

Flatbed PlotterDrum Plotter

Micro-graphic plotterInkjet Plotter

MonitorMonitor is a standard output device. It is also known as VDU (Visual Basic Unit) Screen. Monitor is used for interactive processing. In other words, the data being fed is displayed on screen. It resembles a television in appearance. The monitor is connected to the video adapter or video card of the motherboard inside the computer.

THANK-YOU