Google is a web search engine owned by Google Inc. It is the most-used search engine on the World Wide Web, handling more than three billion searches each day. 
The main purpose of Google Search is to hunt for text in publicly accessible documents offered by web servers, as opposed to other data, such as image or database search. It was originally developed by Larry Page and Sergey Brin in 1997. Google Search provides several features beyond searching for words. These include synonyms, weather forecasts, time zones, stock quotes, maps, earthquake data, movie showtimes, airports, home listings, and sports scores. Yahoo!
Yahoo Search is a web search engine, owned by Yahoo Inc., and was as of January 2014 the second largest search directory on the web by query volume, at 5.45%, after its competitor Google at 71.36%, according to Net Applications to compete with Microsoft Corporation's Bing search engine. 
Yahoo Search, originally referred to as Yahoo provided Search interface, would send queries to a searchable index of pages supplemented with its directory of sites. The results were presented to the user under the Yahoo brand. Originally, none of the actual web crawling and storage/retrieval of data was done by Yahoo itself. In 2001, the searchable index was powered by Inktomi and later was powered by Google until 2004, when Yahoo Search became independent.Wikipedia
Wikipedia is a free-access, free content Internet encyclopedia, supported and hosted by the non-profit Wikimedia Foundation. Anyone who can access the site can edit almost any of its articles. Wikipedia is the sixth-most popular website and constitutes the Internet's largest and most popular general reference work. 
As of February 2014, it had 18 billion page views and nearly 500 million unique visitors each month.Wikipedia has more than 22 million accounts, out of which there were over 73,000 active editors globally as of May 2014. Although Wikipedia's content was initially only in English, it quickly became multilingual, through the launch of versions in different languages. All versions of Wikipedia are similar, but important differences exist in content and in editing practices. The English Wikipedia is now one of more than 200 Wikipedias, but remains the largest one, with over 4.6 million articles.
BBC Online
BBC Online is the brand name and home for the BBC's UK online service. It is a large network of websites including such high profile sites as BBC News and Sport, the on-demand video and radio services co-branded BBC iPlayer, the pre-school site CBeebies, and learning services such as Bitesize. The BBC has had an online presence supporting its TV and radio programmes and web-only initiatives since 1994 but did not launch officially until December 1997, following government approval to fund it by TV licence fee revenue as a service in its own right.
The website has gone through several branding changes since it was launched. Originally named BBC Online, it was then rebranded as BBCi (which itself was the brand name for interactive TV services) before being named bbc.co.uk. It was then branded BBC Online again in 2008. The Web-based ervice of the BBC is one of the most visited websitesIMDb
The site enables any user to submit new material and request edits to existing entries. Although all data are checked before going live, the system has been open to abuse, and occasional errors are acknowledged. Users are also invited to rate any film on a scale of 1 to 10, and the totals are converted into a weighted mean-rating that is displayed beside each title, with online filters employed to deter ballot-stuffing. The site also features message boards, which stimulate regular debates among authenticated users.
The Internet Movie database (abbreviated IMDb) is an online database of information related to films, television programs, and video games, taking in actors, production crew, fictional characters, biographies, plot summaries, and trivia. Actors and crew can post their own résumé and upload photos of themselves for a yearly fee. U.S. users can also view over 6,000 movies and television shows from CBS, Sony, and various independent film makers.Amazon
Amazon.com, Inc. is an American international electronic commerce company with headquarters in Seattle, Washington, United States. It is the largest Internet based company in the United States. Amazon.com started as an online bookstore, but soon diversified, selling DVDs, VHSs, CDs, video and MP3 downloads/streaming, software, video games, electronics, apparel, furniture, food, toys, and jewelry. The company also produces consumer electronics—notably, Amazon Kindle e-book readers, Kindle Fire tablets, Fire TV and Fire Phone — and is a major provider of cloud computing services.
Amazon has separate retail websites for United States, United Kingdom & Ireland, France, Canada, Germany, Italy, Spain, Australia, Brazil, Japan, China, India and Mexico, with sites for Sri Lanka and South East Asian countries coming soon. Amazon also offers international shipping to certain other countries for some of its products.PayPal
PayPal is an American international e-commerce business allowing payments and money transfers to be made through the Internet. Online money transfersserve as electronic alternatives to paying with traditional paper methods, such as cheques and money orders. It is subject to the US economic sanction list, and subject to other rules and interventions required by US laws or government.
PayPal is an acquirer, performing payment processing for online vendors,auction sites and other commercial users, for which it charges a fee. The fee depends on what currency or payments the seller is using. In addition, eBay purchases made by credit card through PayPal may incur extra fees if the buyer and seller use different currencies.
Facebook
Facebook is an online social networking service headquartered in Menlo Park, California. Its name comes from a colloquialism for the directory given to students at some American universities. Facebook was founded on February 4, 2004, by Mark Zuckerberg with his college roommates and fellow Harvard University students Eduardo Saverin, Andrew McCollum, Dustin Moskovitz and Chris Hughes. The founders had initially limited the website's membership to Harvard students, but later expanded it to colleges in the Boston area, the Ivy League, and Stanford University. It gradually added support for students at various other universities and later to their high-school students. Facebook now allows anyone who claims to be at least 13 years old worldwide to become a registered user of the website, although proof is not required.
After registering to use the site, users may create a personal profile, add other users as friends, exchange messages, post status updates and photos, share videos and receive notifications when others update their profiles. Additionally, users may join common-interest user groups, organized by workplace, school or college, or other characteristics, and categorize their friends into lists such as "People From Work" or "Close Friends". Facebook had over 1.3 billion active users as of June 2014. Due to the large volume of data collected about users, the service's privacy policies have faced scrutiny, among other criticisms. Facebook, Inc. held its initial public offering in February 2012 and began selling stock to the public three months later, reaching a peak market capitalization of $104 billion.
Twitter is an online social networking service that enables users to send and read short 140-character messages called "tweets"
Registered users can read and post tweets, but unregistered users can only read them. Users access Twitter through the website interface, SMS, or mobile device app. Twitter Inc. is based in San Francisco and has more than 25 offices around the world.YouTube
YouTube is a video-sharing website headquartered in San Bruno, California. The service was created by three former PayPal employees in February 2005 and has been owned by Google since late 2006. The site allows users to upload, view, and share videos, and it makes use of Adobe Flash Video and HTML5 technology to display a wide variety of user-generated and corporate media video. Available content includes video clips, TV clips, music videos, and other content such as video blogging, short original videos, and educational videos.
Most of the content on YouTube has been uploaded by individuals, but media corporations including CBS, the BBC, Vevo, Hulu, and other organizations offer some of their material via YouTube, as part of the YouTube partnership program. Unregistered users can watch videos, and registered users can upload videos to their channels. Videos considered to contain potentially offensive content are available only to registered users affirming themselves to be at least 18 years old. YouTube, LLC was bought by Google for US$1.65 billion in November 2006 and now operates as a Google subsidiary.
Netflix
Netflix, Inc. is an American provider of on-demand Internet streaming media available to viewers in North and South America, the Caribbean, and parts of Europe (Denmark, Finland, Ireland, The Netherlands, Norway, Sweden, United Kingdom, France, Switzerland, Austria, Belgium, and Germany), and of flat rate DVD-by-mail in the United States, where mailed DVDs are sent via Permit Reply Mail. The company was established in 1997 and is headquartered in Los Gatos, California. It started its subscription-based service in 1999. By 2009, Netflix was offering a collection of 100,000 titles on DVD and had surpassed 10 million subscribers.
As of September 2014, Netflix has subscribers in over 40 countries, with intentions of expanding their services in unreached countries (such as New Zealand).
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