WELCOME TO THE PRESENTATION SESSION

Computer in Business

GROUP 2

CHAPTER 2

Name Id Topic

Rayhan Ibn Ali 13037425

Components of computer system

Md. Sohag Hossain 13087430

CPU-Control unit

Md. Rubel Hossen 13087440

CPU-Arithmetic logic unit

Md.Mukter Hossain 13047447

Operation perfomed by CPU

Sabbir Hossain 13087455

Input devices

Md. Saiful Islam (Group leader)

13067472

Output devices

Jubayer Hossian 13107489

Memory & storage devices(RAM)

Md. Rasel Mahmud 13107497

Memory&storage devices(ROM,EPROM, Flash memory, hard disk drives)

Soumen Chakrabarti

13117504

Processing devices(micro processors)

Md. Juel Rana 13067508

Advantages of computer in personal life & business

RAYHAN IBN ALI

ID -13037425

Components of computer system

The processor :MotherboardBusCardsPortsMemoryHard disk driveFloppy disk drivePower supply unit

The Memory: Primary memory Secondary

memory Input Devices:

Key board Mouse Floppy disk Scanner Micro-phone Code reader

Output Devices Monitor V ideo display

Printer Projector Plotter

Disk Storage : Hard disk ROM Floppy disk Pen drive Compacted disk

Programme : System programme Application programme

MD. SOHAG HOSSAIN

Id-13087430

TOPIC: CPU- CONTROL UNIT

A component of a computer's central processing unit

Control unit

Implementing the instruction set of the CPU. Performing the tasks of fetching, Decoding, Managing execution Storing results. Transferring data to ALU.

& Finally, carry out instructions in the software and

to direct the flow of data through the computer

Functions of the control unit

NAME:MD.RUBEL HOSSENROLL:13087440COURSE NAME:COMPUTER IN BUSINESSCOURSE NO:203

ARITHMETIC LOGIC UNIT IS THE PART OF COMPUTER PROCESSOR(CPU) THAT CARRIES OUT ARITHMETIC AND LOGIC OPERATION ON THE OPERANDS IN COMPUTER INSTRUCTION WORDS

GRAPHICAL PRESENTATION OF ALU

10

MACHINE INSTRUCTIONS THAT USE THE ALU SPECIFY FOUR THINGS:

The operation to perform.The the first operand (often in a register).The second operand (often in a register).The register that receives the result.

Md.Mukter HossainID. No-13047447Dept. of MarketingUniversity of Rajshahi

TOPIC

Operation perform by CPU / Function of CPU

CPU

The CPU is said to be the brains of any computer system. It provides all the timing and control signals necessary to transfer data from one point to another in the system

.

the transfer of data between itself and the memory section

manipulation of data in the memory section or stored internally

the transfer of data between itself and input/output devices

Complet CPU & Chip Card

Functional unit of CPU

CPU has to implement 4 basic functions during instruction cycle1. fetch2. decode3. execute4. store

Operation perform by CPU

CPU function

Fetch Cycle

Decode Cycle

Execute Cycle

Fetch/Decode/Execute/Store

Animated fetch decode execute

Sabbir Hossain

I.D No: 13087455

B.B.A 2nd Year 1st Semester

Department Of Marketing

University Of Rajshahi

Topic

Input Devices

WHAT IS INPUT?

Any data or instruction entered into the computer is known as INPUT.

An input device helps you to communicate with the computer.

To enter information and issue commands, you use input devices.

Examples of input devices: Keyboard Mouse Scanner Microphone Digital Camera and Web Camera Joystick

Keyboard The keyboard is the most common and widely used input

device. It is made up of buttons called 'keys'. The keys are

arranged into sections:

• Alphabet keys • Function or F keys (F1, F2, F3) • Numeric keys (one set above the alphabet keys and a numeric keypad on the right) • Arrow keys •Command keys (insert, delete, home, end, page up/down)

Image Of Keyboard

Mouse

A mouse is an input devices that fits comfortably under the palm of your hand.

A mouse is a pointing device. We use mouse to control the movement

of the mouse pointer on the screen and to make selections from the screen.

The bottom of a mouse is flat and contains a mechanism that detects the movement of a mouse.

Types Of Mouse

Optical mouse Mouse in which the ball is replaced by an optical

system (light-emitting diode and sensor); it has no movable parts.

Wheel mouse Mechanical or optical mouse that contains a scroll

wheel.

Cordless mouse Mechanical or optical mouse connected to the

computer by infrared or radio signals.

Image of Mouse

Scanner

A scanner is a light-sensing input device that reads printed text and graphics and then translates the results into a form the computer can use.

The image or text can be saved or changed on the computer.

Types Of Scanner

Bar code reader Device that uses an optical scanning

process to decode information contained in bar codes.

Optical scanner Equipment that converts a document’s

graphics or texts into digital data.

Images Of Scanner

Optical scanner Bar code reader

Microphone

Microphone Device that converts electric pulses into

broadcast or recorded sounds.

A microphone allows you to record your voice to the computer.

It also lets you speak to other people using computers or even on the telephone.

A microphone is also called a mic.

Picture Of A microphone

Joystick

A joystick is a pointing device that works on the principle of

trackball

To make the movement of the spherical ball easier, it is

placed in a socket with a stick mounted on it

On most joysticks, a button on the top is provided to select

the option currently pointed to by the cursor

Commonly used for controlling player movements in video

or computer games

Various Types Of Joystick

Digital Camera, camcodor And Web Camera

Web camera Miniature digital camera used to transmit video images

in real time or for videoconferencing over the Internet. Digital camcorder

Portable video camera in which the recording tape is replaced by a processor, which records and stores sounds and images in digital format.

Digital camera Camera that contains a sensor and a microprocessor

rather than film; it records and stores images in digital form, which can then be viewed on a screen.

Picture Of Digital Camera, Camcodor And Web Camera

NAME :MD. SAIFUL ISLAMID: 13067472

Topic : output devices

Output device

An output device is any piece of computer hardware equipment used to communicate the results of data processing carried out by an information processing system (such as a computer) to the outside world.

Output devices

Monitor

SpeakerHeadphon

ePrinter

Plotter

Projector

Monitor

Monitor is a TV like

device that display

information.

It can display text as well as graphic

images in color or black &

white while based on monitor

type.

Monitors are

classified on the basis of color and signals.

Soundcard & speaker

Sound cards enable the

computer to output sound

through speakers. Speakers are required to listen

to music and video CD/DVD sound.

This also allow us to listen to the

computer generated sound.

Some monitors have built in

speakers.

Headphones

Headphones give sound output from

the computer.

They are similar to speakers, except they are worn on the ears so only one person

can hear the output at a time.

Printer

A printer is a device that prints text or illustrations on paper.

There are many types of printers an they are:

Daisy-wheel Dot-Matrix Ink-Jet printer Laser LED Thermal

Plotters are similar to the computer printers.

It is used to draw pictures on paper based on commands from a computer.Plotters differ from printers in that they draw lines using a pen.

They can produce continuous lines.

Plotters are used in engineering applications.

They are more expensive than printers.

plotter

Projector

A projector is a device that enables an image,

such as a computer screen, to be projected

onto a flat surface.

These devices are commonly used in meetings and

presentations as they allow for a large image to be shown so everyone in a room can see.

Welcome to our presentation

session

group no

02

This is Zubayear Hosen ID No is 13107489

Definition of RAM….

RAM stands for Random Access Memory . It is the middleman of CPU and Hard drives . It makes a relationship between CPU and hard drives.

In other words, RAM is the part of computer memory that is used while computer is doing something. It is the short term memory and it’s data storage capacity is volatile because when the electricity is cut off ,then the storage in this memory will be gone.

R A

M

Function of RAM…

01. It helps to increase the speed of CPU ,so the higher RAM is the higher speed of computer is.

02. It is the temporary memory computer uses to store anything temporarily.

03. It acts as the intermediary between the hard drive and CPU.

04. The data incoming and leaving the CPU passes through the RAM easily

05. It holds all currently running information of computer.

06. To run the application , firstly, it is loaded here and then it works.

Types of RAM..

There are mainly two types of RAM. 01.SRAM 02.DRAM

(SRAM) Static RAM is consisted of flip-flop which contains binary bits(0,1). In this RAM the data which is stored is contained as far as the electricity is provided ,other it will be vanished.Features: 01.High speed 02. Costly03.Does not require any refreshment.04.Use for cache

DRAM..

Dynamic RAM is a RAM where binary bits(0,1) are contained in capacitor as electronic charge. In DRAM chip ,capacitor is created by MOS transistor .

There are two types of DRAM. 01.SDRAM(synchronous dynamic RAM) 02.ADRAM(Asynchronous dynamic RAM)Features: 01.Relatively low speed. 02.Low cost. 03. Requires refreshing periodically. 04 .Use for main memory. 05.High control complaints.

MD. RASEL ISLAMRoll-13107497

Topics:

Rom Types of Rom Flash Memory Hard Disk

Rom(Read only memory):

Rom used for storing program and data parmanently. The data and programmes required for some application stored in the rom chip.

Charecteristics:

1. User can only read from it2. Manufacturer stores instruction into rom

memory3. It is permanent

Types of Rom:

PROM(programmable read only memory) EPROM(Erasable programmable read only

memory) EEPROM(Electronically Erasable and

programmable read only memory)

Flash Memory:

Flash memory is an electronic non volatile computer storage medium that can be electrically erased and reprogrammed.

Hard Disk:

Hard disk drives is the main and usually largest data storage device in a computer.The operating software tytle and most other files are stored in hard disk drive

WELCOME TO

PRESENTATION ON

Computer in Business

Soumen ChakrabartiClass i.d 13117504

What is microprocessor?

A microprocessor incorporates in function of a computers central processing unit [cpu] on a single integrated circuit [ic]. Microprocessor is a multipurpose programmable device that accepts digital data as input, process it according to instruction stored in its memory and provides results as output. It is an example of sequential digital logic.

History of microprocessor:

At this modern age we get computers at lower cost. General purposes of microprocessor in personal computers are used for computation, tax editing, multimedia display etc. Intel 4004 is the first commercial microprocessor. It introduced in the market in November 1971. It is very important invention of the 20th century

Structure of microprocessor:

The microprocessor is also known as the central processing unit[cpu]. IT is the brain of the computers.

Work of microprocessor:

Now the computer I use to read this page using a microprocessor to this work. The microprocessor is the heart of any normal computer whether it is desktop machine, a server or a laptop. A microprocessor is a computer processor on a micro chip. The work of microprocessor is given below:

1. For computation 2. Tax editing 3. Communication through internet.4. Multimedia display.

MD. JUEL RANA

Id : 13067508

Advantage of computer in our business life

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