Components of a computer

Components of a computer with four basic units. These:
1 input unit: This unit is used to enter data and programs in the computer system by processing.
2 Storage unit: The storage unit is used to store data and instructions before and after processing.
3 Central processing unit: The CPU takes data and instructions of the storage unit and makes all types of calculations based on the instructions given. Then it is sent to the storage unit. CPU includes INTRYMETIC LOGIC UNIT (ALU) and control unit
4 Output unit: The output unit is used to store the result as production produced by the computer after the processing.


Advantages of Computer (benifits of computer)

Advantages of Computer

benifits of computer

Benefits of computer: Fast data can act very much data. Computers can work more effective than maximum humanity. It has automatically completed the complex tasks for the human being. It is considered to be the following benefits of the computer. The computer benefits data in the digital format. We can store the stores in store digital format, and store the data and store other homepage, and you can store the stores of the codes, and you can store the stores of the codes, and you can use the other software, and you have other universal, and you can use the other software, which can be stored only to use the use of the home, and you use it to use the Internet to use the Internet to use the Internet to use the Internet to use the Internet to use the Internet, you can use it to use for internet use.


Characterstics of Computer

.Characterstics of Computer:

§ SPEED: Computer is very fast calculating device. It can execute basic operations like addition, multiplication, subtraction and division at a few microseconds.

§ ACCURACY: The accuracy of Computer does not go down when they are used continuously for hours together. It always gives accurate results.

§ STORAGE: Computer has a very large storage capacity. It has an in-built memory where it can store a large amount of data. We can also store data in secondary storage devices like Floppy disk, Hard disk etc.

§ VERSATILITY: It means Computer can perform different types of job efficiently. Computer can work with different types of data and information such as visuals, text, graphics & video etc. at same time.

§ PAPER WORK REDUCED: The Computer reduces the paper work of any organization. The required data which was earlier stored in files, drawers and cabinets is now stored in the memory of computer. So Organisation can reduce the paper work.

§ MANPOWER REDUCED: The work which was done by many persons in an office can be done by one computer with more accuracy and efficiency. Thus an Organisation need less manpower or persons to employ.

§ DILLIGENCE: A Computer can work for long hours with the same accuracy and speed because it is free from the problems of boredom or lack of concentration.




Definition of Computer :

  The term computer is derived from the word ‘computer’, this means to calculate. But today's computers are not just calculating devices..

   Computers are versatile; they are capable of performing varied types of jobs and can handle multiple applications at one time.

 The  for computer is: 

A computer is an electronic device thoat manipulates information or data. It has the ability to store, retrieve, and process data and gives the output in a desired manner.


INTRODUCTION TO WEB \ what is web explain / define the web





1. What is the Internet?



The internet is the largest computer network in the world, connecting millions
of computers. A network is a group of two or more computer systems linked
There are two main types of computer networks:
Local Area Network (LAN): A LAN is two or more connected computers sharing
certain resources in a relatively small geographic location, often in the same building.
Examples include home networks and office networks.
Wireless local area network (WLAN) : A wireless local area network (WLAN) is
a wireless distribution method for two or more devices that use high-frequency radio
waves and often include an access point to the Internet. A WLAN allows users to
move around the coverage area, often a home or small office, while maintaining a
network connection.
A WLAN is sometimes call a local area wireless network (LAWN).

2. The World Wide Web (WWW)



When most people think of the internet, the first thing they think about is
the World Wide W eb. Nowadays, the terms “internet” and “World Wide Web”
are often used interchangeably— but they’re actually not the same thing
 The internet is the physical network of computers all over the world.
 The World Wide Web is a virtual network of web sites connected by
hyperlinks (or “links”). Web sites are stored on servers on the internet, so
the World Wide Web is a part of the internet.




A web browser (commonly referred to as a browser) is a software
application for accessing information on the World Wide Web. Each
individual web page, image, and video is identified by a distinct URL, enabling
browsers to retrieve and display them on the user’s device.
History of the web browser
The first web browser, called World Wide Web, was invented in 1990 by
Sir Tim Berners-Lee. He then recruited Nicola Pellow to write the Line Mode
Browser, which displayed web pages on dumb terminals; it was released in 1991.




A web search engine is a software system that is designed to search for
information on the World Wide Web. The search results are generally
presented in a line of results often referred to as search engine results
pages (SERPs). The information may be a mix of web pages, images, and other
types of files.





A website is a collection of related web pages, including multimedia content,
typically identified with a common domain name, and published on at least one web
server. Notable examples are wikipedia.org, google.com, and amazon.com. Today
roughly 380 new websites are created every minute across the World.
A website may be accessible via a public Internet Protocol (IP) network, such as
the Internet, or a private local area network (LAN), by referencing a uniform resource
locator (URL) that identifies the site.
Websites can have many functions and can be used in various fashions; a website can
be a personal website, a corporate website for a company, a government website, an
organization website, etc. Websites are typically dedicated to a particular topic or
purpose, ranging from entertainment and social networking to providing news and
education. All publicly accessible websites collectively constitute the World Wide
Web, while private websites, such as a company’s website for its employees, are
typically a part of an intranet.

6. Web server .



The primary function of a web server is to store, process and
deliver web pages to clients. The communication between client and server takes
place using the Hypertext Transfer Protocol (HTTP). Pages delivered are most
frequently HTML documents, which may include images, style sheets and scripts in
addition to the text content.

7. Home Page .



  1. A home page or a start page is the initial or main web page of a website or
    a browser. The initial page of a website is sometimes called main page as well.
    A home page is generally the main page a visitor navigating to a website from
    a web search engine will see, and it may also serve as a landing page to attract
    visitors.[1][2] The home page is used to faciliate navigation to other pages on the
    site by providing links to prioritized and recent articles and pages, and possibly a
    search box.





1:- computer at home: –

1:- computer at home: – day by day, more and more homes are now going for a personal “home” computer. Computer are used for education and entertainment at home, such as for writing a latter, thesis, e-mails, playing games, chatting, listening to music, creating own small publication etc. in fact anything’s that you can dream of must be having a small or big role of computers for it


2:- communication: –

2:- communication: – computer have played a major role in revolutionizing the communication systems. Using computer you can send e-mails (electronic mail) to your friends and your relatives who live in different countries. People who are in different cities can hold a meeting actually, all because of video conferencing. You can actually chat with the different people on the internet. This all is because of immensely useful compute. Events occurring at one place can be view almost instantly all across the world through computer network.


3:-weather forecasting: –

3:-weather forecasting: – Based on proper inputs only, computer can accurately predict the change in weather condition and direction of winds. This facility is very helpful for people residing in sea zoon regions


4:- Personnel:-

4:- Personnel:-computer greatly ease the jobs of personnel administrators. The machines automate the handing the matters as payroll deduction and insurance claims.

5:-Management: –

5:-Management: – without computers, the sheer volume of information <<monitored by a company might overwhelm the firm`s ability to track it.

6:-Marketing: –

6:-Marketing: – using a wide range of business software, a company`s marketing division can produce sales forecasts and devise new marketing strategies.

7:-Education: –

7:-Education: – Computer used in the field of education. They are used in schools and colleges to impart knowledge to student in highly scientific and practical manner.

8:-Media: –

8:-Media: – Computer are used to give special audio, video, 3-D and mixing effect in audio-visual media.

9:-Banks: –

9:-Banks: –today banks are amongst the forest large organizations to invest heavily on computers. Terminals are provide to the branches and the computer is located centrally. This enables the branches to use the central computer system for information on such things as current balances, deposits, overdraft, interest charge and shares.

10:-sports: –

10:-sports: – Comprised scoreboard, measuring of speed of different performers with the recording of time in milliseconds, action-replays, printings and selling’s of tickets all is possible with the help of computers.






The term computer is derived from the word “compute” to compute means to calculate. Hence, people usually consider a computer to be a calculating device that can perform arithmetic operation at high-speed. And term computer can logically be applied to any calculating device.

A computer can be defined as an electronic device that operates on data, analyzes it and then applies a predefined set of instruction to it to produce some kind of output. A computer is often referred to as a data processor because it can store, process, and retrieve data whenever desired. The name data processor is more inclusive because modern computer not only compute in the usual sense but also perform other function with data flows to and from them.

For example, data processor may gather data from various incoming sources, merge them all, sort them in desired format. Notice that none of these operation involves arithmetic computations in the usual sense but a computer is the most suitable device for performing them.

In the case of computers data is transferred from one part to another through electronic circuits such as switches etc.

A computer is an electronic device that enters the data as input, processes the data store to it as per user’s requirement and provide us the required instructions as output as with high-speed and accuracy.

Computer can perform mathematical and non-mathematical operations. The input is entered into the computer through an input device like keyboard and output is received through output device like printer etc.





The full form of computer is:

       C: – commonly

       O: – operated

       M: – machine

       P: – particularly

       U: – used for

       T: – trade

       E: – education

       R: – research

Computer have made a rapid process. Now almost every person is familiar with the word computer. Earlier, the use of computer was limited only to technical people such an engineers and research scientists. Then started the computer revolution and with lowering of prices, lesser space consumption, lesser learning skills required, easy plug and play and multimedia tools available. These quantities made them a part of our daily life.



 A computer is an electronic device which process raw data according to the specified instruction and produce the information as output with fast speed and accuracy.