1Web Search

Engines

Presented By1. Sandeep Ghosh (12000313081)2. Sanket Chouhan (12000313082)3. Saurabh Kumar (12000313083)4. Saurav Anand (12000313084)

Dr. B. C. Roy Engineering CollegeDurgapur

1.Introduction

Slide Plan

2. History3. Features4. Advantages5. Disadvantages6. Examples7. Future8. Conclusion

A 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. Some search engines also mine data available in databases.

Introduction

4

History Internet search engines themselves predate the debut of the Web in December 1990. The Whois user search dates back to 1982.

The first well documented search engine that searched content files, namely FTP files was Archie, which debuted on 10 September 1990.

Prior to September 1993 the World Wide Web was entirely indexed by hand. The first tool used for searching content (as opposed to users) on the Internet was Archie.  The name stands for "archive" without the "v“.

One of the first "all text" crawler-based search engines was WebCrawler, which came out in 1994. It allowed users to search for any word in any webpage, which has become the standard for all major search engines since.

5

History (Contd.)

Yahoo! was among the most popular ways for people to find web pages of interest,

Around 2000, Google's search engine rose to prominence.  In fact, Google search engine became very popular since then.

Yahoo! switched to Google's search engine until 2004, when it launched its own search engine.

Microsoft first launched MSN Search in the fall of 1998, Microsoft's rebranded search engine, Bing, was launched on June 1, 2009.

FeaturesA search engine maintains the following processes in near real time:1. Web crawling2. Indexing3. Searching Web Crawling: Web search engines get their information by web crawling from site to site. The "spider" checks for the standard file name robots.txt, addressed to it, before sending certain information back to be indexed depending on many factors, such as the titles, page content, headings, as evidenced by the standard HTML markup of the informational content, or its metadata in HTML meta tags.

Features (contd.) Indexing: Indexing means associating words and other definable tokens found on web pages to their domain names and HTML-based fields. The associations are made in a public database, made available for web search queries. A query from a user can be a single word. The index helps find information relating to the query as quickly as possible.

Features (Contd.) Searching: Typically when a user enters a query into a search engine. The index already has the names of, the sites containing the keywords, and these are instantly obtained from the index. The image below sums up all these processes.

Advantages1. We can expand our knowledge

easily through using search engine.

2. There is no doubt that everyone must have something he did not know.

3. In ancient times when people met difficult things beyond their abilities, they often went for books or knowledgeably persons.

4. But nowadays we can simply put some key words in search box and then in less than a second thousands of useful answers will show on your screen. 

DisadvantagesWhile it gives information to the visitors but at the same time people misuse this. Many site owners add unnecessary content to the websites, which has no relevance to the keyword. This spreads a bad word about sites, which genuinely give informative content. Search engines like yahoo and Google have to verify websites due to such misuse.Some times search engines face serious bugs, leading to inappropriate search results.

ExamplesGoogle: Google began in January 1996 as a research project Founded by Larry Page and Sergey Brin Most popular search engine Google has 22 special features, apart from the search box, like weather, unit conversion, currency conversion, time, place, calculator, translator, maps, mails sport scores etc. Yahoo!:

In January 1994, it was created by Jerry Yang and David Filo In April 1994, the website named itself Yahoo! It is, currently, the second most popular search engine, after Google. Like Google, Yahoo also provides lots of features Like Yahoo Mail and Yahoo Messenger.

Examples (contd.)Bing: Bing is a web search engine owned and operated by Microsoft. The service has its origins in Microsoft's previous search engines: MSN Search and later Live Search. Bing provides a variety of search services, including web, video, image and map search products. It uses the ASP.NET programming language . Ask.com:

It is a question answer based search engine. It was founded in 1995 by Gruener and Warthen It is the 4th most popular search engine. Its toolbar extension often faces criticism due to malfunctions

Future Search Engines are becoming more and more accurate, bundled with lots of exciting features and optimized interface. More and more contexts are being added to its databases. From weather prediction to traffic situations, search engines are trying to deliver almost everything to its users. In this context, a future aim for any search engine will be to make itself simpler and more user-friendly, with awesome new developments like virtual assistant apps, that can search content as you speak to them. Optimized search results, in case of low speed connectivity is a new initialization some search engines like Google has adopted.

ConclusionA search engine  like Google, Bing and Yahoo! Search enables users to search for documents on the World Wide Web. It has made our life easier, searching for information and learning is easier. Information on any topic can be found on a simple click.From news to results, from books to websites, through Search engines we get all these using a single device.In sort, Search engine has become a part of our day to day lives.