the main three parts of a computer

THE MAIN INTERNAL COMPONENTS OF A LAPTOP

introduction:

buying a laptop could be crucial for many of you ,people hear about CPU,RAM and other components but they don't understand what they really are, they keep wondering  about how this powerful machine work ,how it can manage to do that huge amount of operations at the same time without losing data or getting stuck in the middle, to expand all the details about this machine keep reading ..  

  top three important parts :

1. the CPU or control processing unit : 

the CPU is  considered  to be the heart of  a laptop ,it controls the operation of the computer and performs its data processing functions ,the faster your processer is the more apps can handle at the same time ,Its major structural components are as follows:

1.  Control Unit:  Controls the operation of the CPU and hence the computer.
2. ALU (Arithmetic and Logic Unit):Does the logical and arithmetic operations.
3. Registers: it's very high-speed storage areas.

CPUs started with having only one core processer, a core simply contains the circuitry needed to execute instructions, but now Dual-core and quad-core CPUs are common the more cores the more process your computer can do simultaneously.

one core processer

                                        

Dual-core processer

     2. HARD Disk:

a hard disk is also called a hard disk drive (HDD) , is a storage device that contains one or more inflexible circular platters that use magnetic particles to store data . Depending on how the magnetic particles are aligned ,they represent either a 0 bit or 1 bit .

Desktops and laptops often contains at least one hard disk. the entire hard disk is enclosed in an airtight sealed case to protect it from contamination .

 

the surface of magnetic disk is formatted as follows:

1. trackers : are concentric(they have the same center)
2. cylinder :is the same numbered trackers on each  recording surface Trackers are divided into sectors , sectors are the smallest unit that can be accessed on a disk
3. cluster: consists of several adjacent sectors .

3. RAM memory:

RAM is a common computer acronym that stands for (random access memory) 

 sometimes called memory or pc memory , it's a short term memory that hold the data needed for your CPU to run your applications and files.

inside your computer RAMs are shaped as a rectangular flat circuit board with memory chips attached , and it gives you the addvantage to add more rams to your computer so it performs better , the more rams the more data will be hold for the processer  .

how RAMs work?

suppose you have a word file saved in your drive and you want to make some changes , when you open the file it will immediately be stored in your RAM and while the CPU works hand in hand with your RAM , data will be delivered to your CPU and the changes will be committed to your file , that's why RAMs must be faster than you long-term storage offered by your computer disk drive , the speed of your RAM determines the flow of your data in and out of the CPU, if your RAM is too slow ,you'll spend a lot of time looking at the spinning wheel cursor.

similarly with your RAM capacity , the higher capacity the more quickly your CPU can complete it's work , and the smother your experience will be .

what is the difference between RAM and long-term storage?

it very important to distinguish between you RAM(short-term memory) and your HDD or SSD storage , RAMs can hold the important files used for the apps that are currently open once you close the app or the file, or even close your computer  all the data stored will be vanished that's why it's important to save your work , when you save your work you are making the changes in your HDD or SSD which will hold the data even if you closed the file or the computer.