Peripheral Ports and Connectors 

Computer ports are very impotent, Be course ports are connection point or interfaces between external and internal computer devices .  

order for a computer to be useful and have the most functionality, there must be a way to get the data into and out of it. Many different ports are available for this purpose . We will discuss the different types of ports and how they later work in this chapter. Briefly, Universal Serial Bus (USB) ,Video, Ethernet , Sound in/out and game ports.  

What is a computer software?

Software is a program and designed by the software engineers using one or more Computer languages. Software is a collection of instruction.

There are two categories of software’s

They are

System Software

System software designed to operate and control the computer hardware and provide platforms for application software .

Examples of system software

• DOS
• Windows 7
• Windows 8
• Linux

Application Software

If a user wants to do some work using a computer, user needs suitable application software.

Examples of application software

• MS word
• MS Excel                                
• Windows media player
• Internet Explorer

What is CPU

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Central Processing Unit (CPU) 

The Central Processing Unit is the brain of Computer. Known as a microprocessor. CPU is complex integrated circuit made of silicone. It is consist of lot of micro chips . A computer CPU is responsible for handling  all instructions, It receives from hardware and software running on the computer.  The CPU understands Electronic functions, accepts input data and possesses  to information . The main hardware parts of computer like RAM, Mother Board, VGA card, Net Work card ,Sound card  are working with the CPU. Before We use the New computer we should connect Monitor,Key board, Mouse, Printers , and other devices with  the  CPU.             

What is the Computer Operating System

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What is the Computer OS ?

The meaning of OS is Operating System . A Computer has been assembled with all hardware Parts . your Computer is now complete. but you power on the your Pc It will not work.  Computer never work only with hardware. It needs a Operating System to get start. The Operating System most impotent program that runs on the Computer . Every Computer must have a Operating System to run the other programs . The Computer Cant work without OS. The Operating System enables to the hardware  . OS make connection with every Hardware Parts and Communication with each other hardware parts.   If you want watch movie or picture that software run on the Computer with the help of Operating  System.

The old Computer system used the command line interface Operating Systems. those are not Graphical use.

In this time almost every computer is using a Graphical User Interface (GUI) Operating System, that is much easier.

popular Operating Systems

• Windows 8
• Windows 7
• Windows XP
• Ubuntu
• Linux
• Android
• Windows 2000
• Windows 98 

Input Device and Out put Device of your Computer

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What is the in put Device?

Input device is more impotent When we use The Computer.  Some Data,information,pictures and Videos can be entered in to the PC using input device. Exemplary If  we want to make art work or Type letter  using Computer ,  The needed Data (photos. letters, videos,) should be entered using input device.

Input Device 

• Mouse
• Key Board
• Mice 
• Bar-code Reader
• Multimedia Device
• Biometric Device
• Touch Screens 
• Adapter Cards

What is Output Device 

 Which is entered unprocessed data process to Oder and emit by the output device. The Video can be displayed on The  Monitor. Sound out form the Speakers . You can type latter or data sheet using Computer Keyboard ( input Device) and Make it Out using Printer. 

Output Device

• Monitor
• Speakers
• Printers
• Projector 
• Plat panel
• GPS
• Head Phones   

Keeping mind that 

CD-ROM,DVD,Flash Drive and Floppy diskette drive are capable of entering data and Information in to the Computer. but those are  not output or input device, These devices are considered storage devices.

Basic Parts of Your PC

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Basic Parts of the Computer

Computer is not a single part. It consist of many hardware parts  and software. Computer is system of many parts working with together. The physical parts, which we can see and touch are collectively on called hardware .Soft ware can't be touched , but software is visible. Computer software contrasts with Computer hardware, which is the physical component of Computer . 

CMOS Battery

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The Role of The CMOS Battery 

Your PC has to keep certain settings when it is turned off and its power cord is unplugged. These settings include the following:

• Date
• Time
• Hard Drive configuration 
• Memory 

Your PC keeps settings in a special memory  chip called the Complementary Mental Oxide Semiconductor.

(CMOS) chip. Actually ,CMOS (usually pronounced see-moss) is a type of memory chip. it is the parameter memory for the BIOS. But that doesn't translate into an easy-to-say acronym. So because it's the Important CMOS chip in the computer, it has come to be called the CMOS. To keep its settings,the memory must have power constantly . When you shut off a computer, anything that is left in main memory  is lost forever. To prevent CMOS from losing its information (and it's rather important that it doesn't), motherboard manufactures include a small battry called the CMOS battery to power the COMOS memory. The batteries come in different shapes and sizes, but they all perform the same function. Most  CMOS batteries look like either large watch batteries or small cylindrical batteries.