MAIN PARTS OF COMPUTER
- MONITOR
- CPU
- KEYBOARD
- MOUSE
- SPEAKER
- MICROPHONE
- HEADPHONE
- PRINTER
The first cathode-ray monitor was invented by Karl Ferdinand Braun in 1897 at the same time when he invented the first cathode ray tube.
LCD is known for ‘Liquid Crystal Display’ made of liquid crystals. It is the most used monitor worldwide, as it requires less space, consumes less electricity, and produces relatively less heat than an old CRT monitor. This display was first used in laptops, and later the manufacturers also being produced for Desktop Computers range from 17 inches to 60 inches. Being these monitors need less space and light in weight, they do not create any trouble in transporting and moving them from one place to another.
2.LED (LIGHT-EMITTING DIODE)
LED’s full form is ‘Light Emitting Diode’ is the latest innovation in the market today’s market competing with LCDs and Plasma Monitors. These types of monitors are slightly curved or flat panel displays that use light-emitting diodes for backlighting on the screen instead of cold cathode fluorescent (CCFL) for back-lighting.
LED displays are more bright with 4k resolution than other displays, due to which it can be read or seen easily in daylight time. LED monitors use less power than LCDs as well as LEDs are widely used by gamers for playing high graphics and HD games.
3.OLED(ORGANIC LIGHT EMITTING DIODE)
OLED stands for “Organic Light Emitting Diode“. As the name suggests, it is made of organic material (such as carbon, plastic, wood, and polymers), that used to convert electric current into light.
This is also the latest display technology used in displays of television, computer screen, game consoles, PDAs, or even in the latest smartphones. It can be thinner or lighter with a higher contrast ratio than LCDs. Since these LEDs are capable enough to produce a lot of different colored light, can be used directly to produce the correct color and there is no need for any backlight, which saves power also requires less space. The OLED display is considered great for watching movies.
4. CRT(CATHODE RAY TUBE )
Here CRT means “Cathode Ray Tube”. Its main part is the Cathode Ray tube which is called the “Generally Picture tube”. The above image is of the CRT monitor and was used in a few decades ago as a desktop computer or to watching TV.
CRT monitors are much heavier in size as compared to LCD and LED monitors. Due to being heavy, they have much trouble while moving and transporting from one place to another. Also, they need more space for installation.
As they now disappeared from the market quickly in the last few decades, because display manufacturers switched their production lines from CRT 4:3 displays to LCD 16:9 widescreen displays in order to survive the transition to the digital world widescreen television of LEDs or LCDs.
Since they were more popular a few decades ago, but still you can have a secondhand version of the CRT monitor in the market.
CRT monitors being older television sets. That’s why are not only bulky but also consume a lot of electricity.
5.PLASMA
The Plasma monitor panel (PDP) is made of Plasma technology is another latest types of computer monitor technology. Display of plasma made with cells. These cells are filled with ‘electrically charged Ionized Gas‘. Such cells are called Plasma.
The basic idea behind its invention is that it illuminates the tiny colored fluorescent lights that create image pixels. Each pixel is made of three fluorescent lights like a tiny neon light- red, green, and blue lights. that produces a superior contrast ratio, along with the intensity of these lights also vary accordingly.
In addition, it has the advantage of slimness, a plasma display is flat rather than slightly curved as an LCDs has. It cuts down image distortion and glare through its perfect flat screens.
A plasma display offers a good response, superior performance, time, and a much wide viewing angle as compared to LCDs. Plasma displays come in sizes up to 60 inches that can be considered the best home theater and HD television.
The major disadvantage of plasma monitors is their limited production and screen size Plasma monitors are heavier in size a well as consume more electricity, on average than LCD monitors.
2.CPU ( CENTRAL PROCESSING UNIT )
The CPU is brain of the computer connecting all the circuits needed to process input, store data, and output results.
Inside the CPU
>Top 5 CPU manufactures in the world.
>intel
>AMD
>apple
>samusng
>hitachi
3.keyboard a 
A computer keyboard is an input device that allows a person to enter letters, numbers, and other symbols (together, these are called characters) into a computer. It is one of the most used input devices for computers. Using a keyboard is often called typing.
A keyboard contains many mechanical switches or pushes buttons called "keys".
>Types of computer keyboards
1.Mechanical keyboards
2. Membrane keyboards
3. Flexible keyboards
4.Ergonomic keyboards
5. Gamming keyboards
6.Wireless keyboards
7. Multimedia keyboards
8.Handheld keyboards
9.Vertical keyboards
10. Projection keyboard
11.Virtual keyboards
~Mouse
A computer mouse is a handheld hardware input device that controls a cursor in a GUI (graphical user interface) and can move and select the text, icons, files, and folders on your computer.
For desktop computers, the mouse is placed on a flat surface (e.g., mouse pad or desk) in front of your computer. The picture is an example of a Logitech desktop computer mouse with two primary buttons and a wheel.
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