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Google search engineThe products of the company is the world's most popular Google search engine, the use of a self-created using PageRank (web page called level) technology to the index page, index is by program "Googlebot" executive, it will regularly visit the web page request known new copy. The faster the page updated, visit the more Googlebot also. Again through in these pages known links to find new page, and join in the database. The index database and web cache size in bytes (ZhaoZhao terabyte) to measure. Has A very popular around the reputable commercial search by the word-to come to, since Google is available for panasonic "by on Google."

Because Google has become one of the most popular search engine, many webmasters keen to track their site's ranking, and trying to explain the reason for the variation of the ranking them. So, now, many web site provides a service, intention in some high flow discussion zone deliberately to join the commercial web link, so that the web site in Google ranking improve. This "invented" although have certain effect, but this kind of charge customer money, in a third party forum big selling advertising, on the one hand, the reader to discuss problems, also made the infringement of business interests; discuss But this approach also obvious violation of the business ethics.

Google has the large number of previous test service integration for part of the search function (such as Google calculator). In Google search in the answer to getting to the universe would take? (what is life, the universe and all things answer?) Will get intelligent search results 42. (this is the famous science fiction "hitchhiker's guide to the galaxy" plot by definition, for is the artificial intelligence to a certain height, that is the performance of the machine can not the human language.)

Google Web APIGoogle Web API (network application program interface or network service) is Google for the registration of the developers public interface. Use Simple Object Access in (SOAP, Simple Object Access Protocol), programmers can be based on the Google search results develop search services and data mining. Also, the net insect can also visit page caching and then put forward the proposal of the page.

By default, a developer can only have 1000 times every day search requests. This program is still being tested. Google is the few put the results through the public network application program interface open to the public search engine; Technorati is another these companies. Google is the service some popular applications include, where Google latest information FindForward express, it is also a survey Google dance of the tool, it monitoring the Google spiders in the activity on the world wide web.

Google close byIn August 2004, Google began to provide a new service called Google introduction, now renamed Google close by. This tool can provide in search pages by content publishers provide books of the search results, and provide even buy books to the web and content relevant advertisements. Google will limit can consult the number of pages of the book.

However, some people have found crack method. And in December 2005, the service is still in Beta Co. stage. The service and the A9.com provide very similar.

In December 2004, Google expands the Google the function of the introduction. [8] the books includes some famous universities and some public library, including Michigan university, Harvard University Widener library of, of Stanford university, Oxford University library) green of the Oxford University libraries and the New York public library. According to the university library and the publication of the books in ten years, Google plans to about 15 million this is located in the public domain books online.

On November 17, 2005, Google will this service was renamed as Google close by.GmailOn 1 April 2004 April fool's day, Google announced the launch of 1 GB of space Gmail email service, April 1, was to increase to 2 GB above, and increased many language entry and rich text editing functions. This email will use email to scan service content of advertising display specific ads to profit. However, the initial release news sparked the suspicions of the industry. Google's products, deputy director Jonathan Rosenberg later told the BBC news reiterated "we release of the Gmail is serious."

Gmail email has more than 7000 MB of storage space. Most of the other than free Internet mail service are many--for example, Microsoft's Hotmail and yahoo mail. In order to hit back Gmail, the two companies release soon mailbox upgrade plan, Hotmail English free mailbox will by 2 GB to upgrade to the 5 GB, yahoo mail free from 4 to 6 MB upgrade to 100 MB, later yahoo mail more to upgrade to the free 1 GB to yahoo, the late even adjusted for unlimited mailbox capacity. Other E-mail service providers also followed by now, there are some mailbox larger than Gmail.

August 25, 2004, the service began to internal test, the public can't free registration. No matter how, some users have received the existing &to Gmail users to invite people have already can use him. Because the exchange system in similar machine-learning on Gmail invited was money and item exchange, Google was to change his policy: don't allow money to change Gmail invitation. On feb. 14, 2007, Google Gmail testing period is over, officially registered is open to the public.

There are many people criticize Gmail privacy strategy/among them are "of the remainder of the E-mail criticism copy may in our system to keep a period of time, even you took it from the mailbox delete or terminate your account in the same way." after This clause. Many people believe that this means that Google will have permanent archive has already been deleted email copy. Google later announced that they will use as soon as possible "will make reasonable and effective from our system information" delete. However, a lot of criticism still oppose Google plans to add auto scan email mailbox in the text of the related advertisements.

&toBloger is the largest and most DuoRen use blog system. In 2003, Google took over Pyra LABS and its &to service. Google making previously need charge of some function to the user for free. Tools and services, making &to released more simple weblog. Users don't need to write any code or install any software and scripts. And, the user can change the freedom of the design scheme of the blog.

AdsenseAdsense is Google keywords self-service systems, can allow users to select a template to set his domain name keyword advertising. After Google adsense self-service system can automatically test and choose contain pictures) template choose, but users and have actually can choose the template for setting, and the new adsense self-service systems provide including bank, law, education and business, etc DuoGe template. Google adsense can allow users to choose the appropriate templates for the user to provide a more personalized service, domain name holder can according to oneself need to choose the template, still can set the key words made "for sale", the user can search related words and through a domain name associated information page.

OrkutOrkut not in Google's page mentioned. Orkut is a service provider, it by Google engineers create and maintain. Orkut is a social network service, Orkut users can leave them in the personal or professional information, create and the relation between friends or for common interests to join the virtual community.

Google NotebookGoogle Notebook is Google a service to provide for the users to easily stored and finishing the information collected from the Internet, and use its sharing function let users will their notes released to others to view. Chinese version in April 2007 officially launched.

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