The Free Computer Knowledge

The web can be an incredible resource, providing information on nearly any topic imaginable. Are you planning a trip? Writing an economic paper? looking for a movie review? Trying to locate a long lost friend? Information source related to this question, and much, much more, are available on the web. which over 20 billion page and more being added Delhi, the way is massive collection of interrelated pages. Which so much available information, locating the prices information you need can be difficult. fortunately, a number of organisation called search service corporate website that can help you locate the information you need.
they maintain hub database relating to information provided on the web and the internet. the information Store at this database include addresses, content description for classification, and words appearing on web page and other internet informational resource. Special program called spider continually look for new information and update the search service database. Additionally, search services provide special program called search engine that you can use to locate specific information on the web.

SEARCH ENGINES

search engines are specialised program that assist you in locating information on the web and the internet. To find information, you go to search services website and use its search engine. For example Yahoo search engine. this search engine, like most others, provides two different search approaches.

Keyword search: in a keyword search, you enter a password or phrase reflecting the information you want. The search engine compares your entry against its database and return a list of hits, for sites that contain the keywords. is it includes a hyperlink to the reference web page for other resource along with a brief discussion of the information contained at the location. Mini e search result in a large number of hits for example if you where to enter the keyboard travel, you will get thousand of hits. search engine for the The hills according to those sites that most likely contain the information requested and present the list of you in that order, usually in group of 10.

Director search: most search engines also provide a directory of list of categories of topics such s or autos finance and games. In a directory search you select a category or topic that fits the information that you want. Another list of sub topics related to the topic you selected appears. you sleep that some topic that best related to your topic and another sub topic please continue to grow your search in this manner until a list of website appears. This list corresponds to the hit list previously discussed.
   As a rule, if you are searching for general information is the director research approach. For example, to find information about classical music, use a directory search engine with the category music and then select the sub topic classical if you are searching for specific information used the word approach for example if you were looking for a specific music file old use search that include the album title and/or the artist name.
A recent study by the NEC and Research institute found that anyone searching include only a fraction of the information resource on the web. therefore it is highly recommended that you use more than one search engine researching important topic for a list of some of the most widely used search engine for you could use a special type of called a meta search engine.

Yahoo's search engine provides keywords and directory search

Search engine

META SEARCH ENGINE.

One way to research a topic it to visit the website for several individual search engine at its Centre the search instructions wait for the hits to appears review the list and visit selected site. This process can be. Time consuming and duplicate response for different search engines are inevitable. meta search engine offer and alternative methods in a program that automatically submit yourself request to several search engine simultaneously.the meta search engine service the result of elements duplicate, for that the heat and then provides the edited list to you a list of several meta search engine available on the way one of the best known is khoj.

Metasearch sites

SPECIALIZED SEARCH ENGINE.

Specialised search engines focus on subject specific website specialised site can potentially save the time by narrowing your search for a list of just a few selected specialist search engine for example let's say your searching about the fashion industry you called being with a general search engine like Yahoo or you could go to a search engine that specialise specifically information such as infomat.com.

Specialized search engines

CONTENT EVALUATION

search engine excellent tools to locate information on the way to be carefully hangover how do you use the information you find I like most published material found in newspaper journals and text books not all the information you find on the web has been subjected Street guideline to ensure accuracy in fact anyone can publish content on the way many sites such as wikipedia.com allow anyone to post new material sometime anonymously and without critical insulation the accuracy of information you find on the way we consider the following.

Authority: is the author and expert in the subject area is the site and official site for the information presented for is the site and individual personal website.

Accuracy: has the information been critically review for correctness prior to posting on the web does the website provide method to report inaccurate information on the author.

Objectivity: is the information technology reported or does the author have a bais. Does the author appear to have a personal agent aimed at convincing or changing the readers opinions.

Currency: is the information up to date does the site specify the date when the site was updated.

As previously mentioned, communication is the most popular internet activity, and its impact cannot be overestimated. at a personal level, friends and family can stay in contact with one another even when separated by thousands of miles. at a business level, electronic communication has become a standard, and many time preferred, where to stay in touch with suppliers, employees and customers. these three most popular type of internet communication our e-mail instant messaging, social networking, blogs and wikis.

E-MAIL

E-mail or electronic mail is the transmission of electronic message over the internet. At one time email consisted only of basic text message. Now email routinely includes graphics, photos and many different type of file attachment. People all over the world send email to each other. You can e-mail your family, your coworkers, and your friends. all you need to send and receive e-mail is an e-mail account from my Asus to the internet, and an e-mail program. song of the most widely used e-mail program on Microsoft Outlook Express, Gmail, Yahoo mail etc.

Basic elements of an e-mail message

Atypical e-mail messages has three basic element, header, message and signature. The header appear first and typically include the following information.

Address

addresses of the person sending, receiving, and, personally, anyone who is to receive copies email address have two basic parts. The first part is the username and the second part is the domain name which is leave the top level domain.
In our example e-mail, bsunita is sunita's user name. The server providing e-mail service for Sunita is yahoo.com.

Subject

A one line description, used to present the topic of messages
Subject line type kar GRS played when a person check his or her mailbox.

Attachment

many email programs allow you to attach file such as documents and images files. If you messages as an attachment, the file name appears on the attachment line. if you are sending a large file over there are more efficient way to send the file.

The letter or messages, next finally the signature provides additional information about the sender. typically this information includes the sender's name, address and phone number. e-mail can be a valuable asset in your personal and professional life now over, like many other valuable technologies they are drawbacks to we all receive a lot of unwanted and uncollected e-mail every year.
This welcome mail is called Spam. Why sperm is is intended a destruction and sense it also can be dangerous. for example computer viruses or restrictive program are often attached to unsolicited email computer virus.
An effective approach has been the development with the use of spam blockers this program use a variety of different approach to identify and element Spam.

INSTANT MESSENGING

Instant messaging (IM) allows to or more people to contact each other via direct live communication. to use instant messaging, you register with instant messaging server and then specify a list of friends. Whenever you connect to the internet, specials of your messenger server that you are online. in response the server will notify you if any of your friend are online at the same time it notifies your friend that you are online you can then and messages directly back and forth to one another. most instant messaging program also include video conferencing features, file sharing, and remote assistance many business routinely use this instant messaging features.
The most widely used instant messaging server are rediff BOL instant messenger. Microsoft MSN messenger and Yahoo messenger. one limitation however is that many instant messaging server to not support communication with others circus for example at the time of this writing a user register with Yahoo cannot use instant messenger to communicate with a user register with redif recently hangover songs of the companies have started providing universal instant messenger program that perform this limitation. for example, game, koti, and trillion provide instant messaging service that do support communication with other service.

SOCIAL NETWORKING

one of the fastest growing using of the internet and social networking for connecting individual to one another. Three basic categories of social networking site are reuniting friend of friend and common interest.

reuniting sites are designed to connect people who have known one another but have lost touch for example an old school friend that you have not seen for severe which join a social network connecting to a reuniting site and providing profile information such as your age, gender, name of high school and and so forth this information is added to the reacting site number database temper are able to search the database to locate individual meaning of the site will even notify you whenever in individual join for professional information maths some parts of your (such as  year of passing out from school) one of the best known dating site is Facebook.

Friend-of-a-Friend sites are design to bring together to people who do not know one another but share a common friend the theory is there if you share a common friend when it is likely that you would become friends for example in network cloud be started by one of your aquaintannces by providing profile aquaintannces site to connect to a friends of your acquaintance. You could even join the list of friends provide it at the site two will known friend of a friend site our friendester and myspace.

Friend-of-a-friend site

common interest sites bring together individual that share common interest or hobbies. you select a networking site based on a particular interest for example if you wanted to share image might join flicker. If you are looking for a business contact you might join LinkedIn. if you wanted to locate or create a special interest group you might join Meetup.
before providing any information to social networking site for to any interviews were considered carefully what you are disclosing. Do not provide important or early personal information for a list of some popular social networking site.

Blogs And Wikis

in additional to social networking sites, there are other type of site that help ordinary people communicate across the web.

Social networking sites

many individual create personal website call weblogs or blogs to keep in touch with friends and family blog posting our time stamp and arrange with the newest item. Open readers of this site are allowed to comment some dogs are like online diaries with personal information other focus on information about a hobby for them search s meeting electronic device or good books although most are written by individual blockers they are also group block with multiple contributors some businesses and newspaper also have started o'clock as a quick publishing method. Simran site provide tools to create blocg  2 of the most widely used blogger and WordPress.

A wiki is a website specially designed to allow visitor to feel in missing information or correct increases wiki com from the how many word from first which describe the simplicity of editing and publishing throw wiki wiki support collaborative writing in which there is not a single expert author but rather a community of interested people that build knowledge over time. Perhaps the most famous example is Wikipedia and online 99 cyclopedia writing and edited by anyone who wants contribute that has million of entire in over 20 languages.

Blog creation site

Wikipedia

The internet and the telephone system are similar you can connect a computer to the internet much like you connect your phone to the telephone system. once you are on the Internet, your computer because an extension of what seems like a gate computer a computer that branches all over the world. when provided with a connection to the internet, you can use a browser program to search the web.

PROVIDERS

the most common way to access the internet is through an internet service providers (ISP). the providers are already connected to the internet and provide a path for connection for individual so assess the internet. your college or university most likely provides you with free access to the internet idea through its local area network or throw a dial up telephone connection. They are also song companies that offer free internet access.
The most widely used commercial internet service providers are national and wireless providers.

National service providers like BSNL (Bharat sanchar Nigam limited), VSNL (Videsh Sanchar Nigam Limited) are widely used. They provide SS throw standard telephone cable connection. User can access the internet from almost anywhere within the country for a standard free without incurring long distance telephone charges.

Wireless Service Providers:- offer internet connection for computer with wireless modem and a wide area of wireless device.
user connect two ISP using one of a variety of connection technologies including DSL, cable, and wireless modem.

Firefox

BROWSER 

BSNL ISP

Browser a program that provide access to web resource. This software connect to remote computers, open and transfer files, display text and images, and provides in one tool  and uncompleted interface to the internet and web documents. browsers allow you to explore, or to surf the web by easily moving from one website to another. Three mean known browser Mozilla Firefox, Apple Safari and Microsoft Internet explorer.

for browsers to connect to resource the location or address of the resource must be specified. This addresses are called uniform resource locator (URLs). All URLs have at least two basic parts the first part present the protocol used to connect to the resource. protocol are rules for exchanging data between computers the protocol http is the most widely used web protocol. The second part present the domain name. it indicates the specific address where the resource is located that woman is identified as ndtv.com (many URLs have additional parts specifying directory path, file names, and pointers.) The last part of the domain name following the dot (.) Is the top level domain (TLD). It identify the type of organisation for example dotkom indicates a commercial side the URL http:// www.ndtv.com connect your computer to a computer that providers information about NDTV.
once the browser has connected to the website a document file is sent back to your computers. Which document type kalli contains Hypertext Markup Language (HTML). The browser interpret the HTML formatting instructions and displays the document as a web page. for example when your browser first connects to the internet, it opens up to a webpage specified in the browser settings. this page represents information about the site along with reference and hyperlinks or links that connect to other documents containing related information text files, graphic images, audio and video clip.
This documents may be located on a nearby computer system or on one halfway around the world. the link type appear on the web page underline and colour text and/or images. To assess the reference material all you do if click on the highlighted text or image. a connection is automatically made to the computer containing the material, and the reference material are there on your display screen.
web pages also can contain special programming to add interest and activity. A language called JavaScript is often used to trigger simple interactive features, such as opening new browser Windows and checking information enter in one line forms. Another example is applets, which are written in the JAVA programming language. This programs can be downloaded quickly and run by most browsers. Java applets are used to present animation, display graphics, provide interactive games, and much more. 

The Internet was launched in 1969 when the United States founded IT project that the development in national computer network called Advanced Research Project Agency Network (ARPANET). The internet is a large network that connect together smaller network all over the globe. The Web was introduced in 1991 at the Centre for European Nuclear Research (CERN) in Switzerland. Free your internet was all text graphic animation, sound, aur video. The web made it possible to include. It provided to multimedia interface to resources available on the internet. From this early research beginning the internet and the way into one of the most powerful tools of the 21st century.

It is easy to get the internet and the web confused, but they are not the same thing. The internet is the actual network. it is net of wire, cable, satellites and rules for exchanging information between computer connected to the network. Being connected to this network is often described as being online. The Internet connect million of computers and research throughout the world. The web is a multimedia interface of the resources available on the internet. Everyday over a billion user from nearly every country in the world use the internet and the web. What are you doing? The most common uses of the following.

Communicating. Is by far the most popular internet activity. You can exchange E-mail with your family and friends almost anywhere in the world. You can join and listen to discussion and debates on a wide variety of special interest topics.

Communicating

Shopping one of the fastest growing internet applications. You can Windows of, look for the latest fashion, search for bargains, and make purchase.

Shopping

Searching for information has over been more convenient you can say some of the world's largest libraries directly from your home computer you can find the latest local, national and international news.

Searching

Entertainment option of nearly endless you can find music, movies, magazines and computer games.

Entertainment

Education or e-learning is another rapidly American web application you can take classes almost any subject. They are course just for fun and they are scores for high school, college, and graduate School credit. Som cost nothing to take and father cost a lot.

E-learning

The internet and the web.
the internet and the web are considered by most to be the two most important technologies for the 21st century understanding how to efficiently and effectively use the internet to browse the web communicate with others and locate information are indispensable computer competencies.
The internet, the web, and electronic Commerce.

POWERFUL SOFTWARE.
The software now available can do an extra ordinary number of task and help you in a endless number of ways. you can create professional looking document, analysis massive amounts of data, create dynamic multimedia web pages and much more.
today's employer are expecting the people they hire to be able to efficiently and efficiently use a variety of different type of software.

POWERFUL HARDWARE.
micro computers are now much more powerful than they used to be new communication technologies such as wireless network card dramatically changing the way to connect to other computers, networks and the internet.
However despite the rapid change of specific equipment, there is interior features remain unchanged.
Those the competent and user soul focus on these features.

Connectivity is the capability of your microcomputer to share information with other computers. The single most dramatic change in connectivity in the past 5 years has been the the widespread use of mobile or wireless communication device. For just a few of this device, many expert predict that this wireless applications are just the beginning of the wireless revulation regulation that is expected to dramatically effect the way we communicate and use Computer technology.

Central to the concept of connectivity is the network a network is a communication system connecting two or more computers. The largest network in the world is the internet it is like egg and highways that connect you to million of other people and organisation located throughout the world. The Web provides a multimedia interface to the numerous resources available on the internet.

Wireless communication devices

Data is raw, unprocessed facts, including text, numbers, images and and sounds. As we have mentioned earlier, process data becomes information. When Store electronic Kali in files, data can be used directly as input for the system unit. Four common type of files are document, files worksheet files, database files, and presentation files.

Document files. created by word processor to save document search as memos, term papers, and letters.

Worksheet files. Created by electronic spare sheet to analyse things like budget and to predict sales.

Database files. typically created by database Management programs contain highly structure and organise data. For example, an employee database file might contain all the worksheets names, employee ID, job titles, and other related pieces of information.

Presentation files. Created by presentation graphic program and to save presentation material. For example, a file might contain audience and outs, speaker notes, and electronic slides.

Four types of files: presentation, database, worksheet, and document.