Computer, Laptop, system, Pc and Machine these are some words which we us. Today’s computer journey starts from 1622 when first machine Abacus was invented for math adding and subtracting. In 1837 Charles Babbage makes first mechanical computer. After that the innovation in computer is still in way. Supper computer are made and this machine going better to better and big too small fast and more reliable. Computer understand binary language (0, 1), used DC supply to run. Every field of life this machine is used and make work easy and fast for human’s beings.
A Pc mainly consist on two things the hardware and the software. Hard disk, CPU, Ram, Motherboard. Power supply, Mouse, Keyboard, Monitor or LCD, Speaker, CD Drive etc. are called hardware and System Software’s, Applications Software, Drives etc. are software’s. Now we discuss them and some other parts of computer one by one.
Hard Disk
A system hard disk contains a platter and a head. Data save on platter, platter have sector and tracks to save data. The roll of head is to read data form the platter. If hard disk damaged or crashed the all data on it will be lost. When we make partitions in hard drive. This is only virtual partition not physically.
RAM
Stands for random access memory. When you work on computer you noticed that if you open a program after starting the computer its take time to open. Shutdown the program and open it again it, it takes less time to open then pervious attempt because data is not in ram. So it open fast. Ram received data form hard disk give it to processor and give data to hard disk from processor. It is used in computer to fast working. If you remove ram from its slots then make your to place it back with right direction. If you insert it wrong then no display will show.
CPU
Stands for Central Processing Unit. All things managed by CPU. It is like a brain of the computer. CPU process one task at a time. It divide the tasks at give nanoseconds to every tasks one by one. CPU size is very tiny its size is equal to our finger nail. On it hundreds of thousands citrus are printed. It made with silicon. Processor locked on motherboard. If you can remove the CPU from its place replace it very carefully because if you fit it wrong it will be damaged.
Motherboard
All things are connected with each other through motherboard. BIOS (Basic Input Output System) is integrated on motherboard. Motherboard have space for external VGA, LAN cards slots. For system clock a cell also placed on mother board.
BIOS
Stands for Basic Input Output System. This chip contains important data. When system software is not installed the BIOS works. Laptops and Pc startup menu controlled by BIOS. There is an option available in setup to set password on BIOS.
Power Supply
It gives power to all system. It converts power AC to DC and give the correct amount of DC supply to every hardware part. Power supply have different types and powers according to the other hardware conditions.
CD/DVD Driver
To read and write data form a CD or DVD we used it. It contains on a lens for read and write data. This is an input and also an output device. In past days floppy and floppy drive is also in usage but now a days it cannot be used because it have low space.
This is the brief history of computer and its hardware parts now I will explain the software side of system. Two types of software are used in pc. System and application software’s. Different types of viruses also a software. The difference between them is below.
System Software’s
Those software’s which are necessary for running a pc is called system software’s. Like Windows, Linux, Different types of driver. Without a system software a user cannot work properly.
Application Software’s.
Those software’s which is used for different types of work. They not used to run system but used for different work like typing, drawing called application software’s. MS Office, Photoshop. VLC are application software’s.
Windows
Microsoft launches windows and it popular very fast. Because it is very user friendly. Windows 1998, Windows XP, Windows 7, Windows 8 are versions of it till now. It give a huge comfort to the user. It is the most popular operating system in world. The only drawback of it is that its protection to viruses is very weak.
Linux
Linux is also an operating system. The best part of it is that it gives very strong protection against viruses. These operating system created in C language. Many a people are involved to make it. A windows system software cannot run in Linux and a Linux software cannot be run in windows.
Apple Operating System
Another operating system is also in market it Mac OS. It is used in apple notebooks, laptops. It is also good operating system.
Input Devices and Output Devices
The Input Devices
The devise which used to give a command to pc is called input devices. Keyboard, Mouse, Scanner etc are input devices.
The Output Devices
The devices which used to get output from the computer is called output devices. Speakers, Monitor, printers are some examples of output devices.
