Sajib Presentation CSC 103

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Presentation Of CSC-103Department: BCSE

Group:01Submitted to

Mst.Shirmin Sharkar Rume

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Group Menbers

• Md.Surat Rahman• Md.Robiul Awal• Md.Tuhin Babu• Md.Sanjidul Alam• Md.Shohag Rana• Mst.Teheran Akter• Mst.Moushumi Akter• Puja De• Mst.Konok Akter• Mst.Kobita Akter

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What Is Computer?

Computer:• A computer is an electronic device

that manipulates information or data.It has the ability to store,repair and process data.We can use a computer to type documents,send email and browse the web.We can also use it to accounting,database management,games and more.

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Basic Parts Of Computer

Hardware: Hardware is any part of computer that has a physical tructure,such as the computer monitor or keyboard.

hardware

Software: Software is any set of instructions that tells the hardware what to do.It is what guides the hardware and tells tells it how to naccomplish each task.Some example of software include web browsers,games and word processors such as Microsoft Word.

Software

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Categories Of Computers

General purpose computer:1.General purpose computers are designed to solve

large varities of problem.2.They can be given large amount of programmes to

solve different problems.3.Usually they are used in our daily life activities.Special purpose computer:1.They are designed to solve specific types of

problems.2.They can be used to pocess only romeric data.3.They are usually used by the scientific and

researchers.

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Another three types computer• Analog computer:

Old ,out dated computers.They calculate physical quantities.eg.ammeter,voltage meter etc.

• Digital computer:

They use binary digits for processing.eg.PC.• Hybrid computer:

They comprise the best of capabilities of digital and analog computers.

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Pictures

Analog computer Digital computer

Hybrid computer14.02.16

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Classification of computer

Micro computer1.Used for single user.2.Consists of CPU,input

device,output device and storage unite.

3.Most cheaper and slowest computer.

Micro computer

Mini computer1.Digital computer and multi-user

system.2.Can support 4-200 users

simultaneously.3.Most speedy than micro

computer.

Mini computer14.02.16

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Classification of computer

Mainframe computer1.Multi-user,multi-

programming and high performance computer.

2.Have high speed,high storage capacity.

3.Have two terminetors,dumb and intelligent terminal.

4.Also known as ‘Workstation’.

Mainframe computer

Super computer1.Most speed and most

expensive computer.2.Usually used by the scientists.

Super computer

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Charecteristics of computer

*Accuracy: It always gives us correct answer.

*Storage capacity: Computer has a huge storage capacity.

*Reliability: It always gives us correct answer. *Diligence: Computer can not be tired after along

time work.*Versatility: Computer is able to perform many types

of function.

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Generation of computer

First generation computerHardware: Used vacuum tuber for circuitry and magnatic

drums for memory.Software: Machine language.Input device: Punch card.Output device: Printer.

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Second generation computerHardware: Used transistors replaced vacuum tubes. Software: Assembly languageInput device: Punch cards and paper tape.Output device: Printer

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Third generation computerHardware: Used Integrated Circuits chips(IC)Software: Language.Input device: key board.Output device: Printer.

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Forth generation computerHardware: LSI,VLSI tecnology.

Software: Ms-dos,windows

Input device: Keyboard,Mouse.

Output device: Monitor,Printer.

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Fifth generation computerHardware: Artificial Intelligence.

Example: Robotic

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Computer Monitor

MonitorA computer monitor is an electronic device that

shows pictures. Monitors often look similar to televisions. The main difference between a monitor and a television is that a monitor does not have a television tuner to change channels. Monitors often have higher display resolution than televisions. A high display resolution makes it easier to see smaller letter sand fine graphics.

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Different types of Monitor

CRT Monitor:Advantage:Since resolution is not defined at the outset, high-

resolution images can be displayed with no problem. Users of PC home cinema can take full advantage of their graphics cards and get an image of excellent quality. The blacks are beyond reproach, and the images are fluid and precise - in fact, very close to what cinema provides.

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Disadvantage

Tri-tube projectors are heavy (more than 50 kg), bulky and difficult to install, and are therefore suitable only for fixed setups.

Finally, convergence adjustments (superimposing the red, green and blue images) are difficult - which can either take a lot of time or cost you a lot of

money.

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Different types of MonitorLCD monitor:

Advantage* LCD monitors display static images from computer sources extremely well with full color

detail and no screen burn-in.*The number of pixels per square inch on an LCD display is typically higher than other display

technologies.* LCD monitors are good at displaying large amount of data e.g. on an Excel spreadsheet with

exceptional clarity and precision.They are available in many more sizes.

* They are not affected by increase or decrease in air pressure hence used in airplanes.* LCD technology is not prone to screen burn-in or ghosting.*LCD televisions require substantially less power to operate than plasma.* LCD monitors are generally better for public display such as airport signage and retail store

signage due to the bright room light environment.

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Disadvantage

They suffer from a motion blur effect, where the individual pixels are just slightly out of step with the image on the screen. The high refresh rate of LCD televisions can have some undesirable effects on the picture. With LCD technology, as the back light ages, it can change colors slightly.

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LED Monitor:

Advantage

It is very important to know that LED monitors are usually lighter and thinner than LCD monitors , The fluorescent bulbs used in an LCD monitor are bigger , heavier and They can make the monitor bulkier as compared to the materials used in LED monitors .

You should know that LED monitors can be large enough but they will not take too much space on the working desk , So They will cause better visual quality for the user.

It is very important to know that LED monitors offer better and sharper colour reproduction as compared to LCD monitors , and the production of LED monitors has been increased which makes them more affordable choices .

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Different types of MonitorDisadvantage

It is very important to know that LEDs are more expensive than conventional lighting technologies , They must be supplied with the correct voltage and current at a constant flow , And this requires some electronics expertise to design the electronic drivers .

You should know that LEDs can shift color due to age and temperature , And two different white LED will have two different color characteristics, So , They affect how the light is perceived .

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Different types of MonitorOLED Monitor:

AdvantageThe biggest advantages of OLED displays are the things that photographers are most likely to

appreciate. Firstly, the color gamut is wider than that of an LCD display, allowing more accurate reproduction of the colors of your images. Secondly, thanks to the totally unlit black pixels, the contrast is really high, allowing a more realistic impression of how your images will look. OLED displays have greater viewing angles, allowing more flexible use of the camera, both for shooting and reviewing images, or showing them to others.

Perhaps the feature that makes OLED most attractive for use in photography is its speed. With refresh rates about 1,000 times quicker than an LCD, it can be used to represent the increasingly fast live view output from the latest cameras with ever improving realism. This is particularly important where the technology is being used for electronic viewfinders, and a rapidly updating, smooth representation of movement can help re-create the optical viewfinder experience.

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Different types of Monitor DisadvantageOutdoor performance.

As an emissive display technology, OLEDs rely completely upon converting electricity to light, unlike most LCDs which are to some extent reflective; e-ink leads the way in efficiency with ~ 33% ambient light reflectivity, enabling the display to be used without any internal light source.OLEDs typically produce only around 200 nits of light leading to poor readability in bright ambient light, such as outdoors. Displays with some degree of reflectiveness increase their brightness as ambient light increases, so overcoming unwanted surface reflections without using any additional power.

Water damage.Water can damage the organic materials of the displays. Therefore, improved sealing processes are important for practical manufacturing. Water damage may especially limit the longevity of more flexible displays.

Power consumption.While an OLED will consume around 40% of the power of an LCD displaying an image which is primarily black, for the majority of images, it will consume 60–80% of the power of an LCD - however it can use over three times as much power to display an image with a white background such as a document or website. This can lead to disappointing real-world battery life in mobile devices.

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THE END Thanks

To All14.02.16

Sajib Presentation CSC 103

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