Copyright
Copyright is a set of exclusive rights granted to the author or creator of an original work, including the right to copy, distribute and adapt the work. The exclusive rights are however balanced for public interest purposes with limitations and exceptions to the exclusive right - such as fair dealing and fair use. Copyright theory says that it is the balance between the exclusive rights and the limitations and exceptions that engenders creativity. Copyright does not protect ideas, only their expression or fixation. In most jurisdictions copyright arises upon fixation and does not need to be registered. Copyright owners have the exclusive statutory right to exercise control over copying and other exploitation of the works for a specific period of time, after which the work is said to enter the public domain. Uses which are covered under limitations and exceptions to copyright, such as fair use, do not require permission from the copyright owner. All other uses require permission and copyright owners can license or permanently transfer or assign their exclusive rights to others.
sourc :http://en.wikipedia.org/wiki/Copyright
Fair use
Fair use, a limitation and exception to the exclusive right granted by copyright law to the author of a creative work, is a doctrine in United States copyright law that allows limited use of copyrighted material without requiring permission from the rights holders. Examples of fair use include commentary, criticism, news reporting, research, teaching, library archiving and scholarship. It provides for the legal, non-licensed citation or incorporation of copyrighted material in another author's work under a four-factor balancing test. The term fair use originated in the United States. A similar principle, fair dealing, exists in some other common law jurisdictions. Civil law jurisdictions have other limitations and exceptions to copyright
source: http://en.wikipedia.org/wiki/Fair_use
Patent
A patent is a set of exclusive rights granted by a state (national government) to an inventor or their assignee for a limited period of time in exchange for a public disclosure of an invention.The procedure for granting patents, the requirements placed on the patentee, and the extent of the exclusive rights vary widely between countries according to national laws and international agreements. Typically, however, a patent application must include one or more claims defining the invention which must be new, non-obvious, and useful or industrially applicable. In many countries, certain subject areas are excluded from patents, such as business methods and mental acts. The exclusive right granted to a patentee in most countries is the right to prevent others from making, using, selling, or distributing the patented invention without permission.Under the World Trade Organization's (WTO) Agreement on Trade-Related Aspects of Intellectual Property Rights, patents should be available in WTO member states for any inventions, in all fields of technology,and the term of protection available should be the minimum twenty years.Different types of patents may have varying patent terms
sourc :http://en.wikipedia.org/wiki/Patent
Why some inventions can not be copyrights? : Because the several categories of material are generally not eligible for copyright protection, such as works that have not been fixed in a tangible form of expression.
ﾟ‘ﾟ･✿.｡.:* Engine *.:｡✿*ﾟ¨ﾟ
A search engine works by looking up information on the internet based on what you ask it to look for. You type words or phrases you want more information about in the search box, click on search, and get the results.
A search engine does exactly what its called - it searches certain parts of the internet database based on the words you are searching for information on. For example, if you want football stats, it's not gonna bother looking on Cosmopolitans website, and likewise if you wanted makeup hints, they wouldn't check NFL.com.
1.Directory search engine Most people are familiar with the concept of search engines these days. In fact, most Internet users turn to search engines on an almost daily basis to help locate information on a specific topic. Internet directories on the other hand are often overlooked, misunderstood and underappreciated by searchers looking for just the right site and by site owners looking to improve their traffic.
Often mistaken for search engines, directories are actually collections of human reviewed web sites that have been arranged into topical categories. Popular directories like Yahoo!, Best of the Web and Skaffe can serve as excellent starting points for navigating the Internet. They can also serve as a valuable resource for small business owners looking for ways to drive more traffic to their web sites.
2.General search engine
General search engines, including web search engines, selection-based search engines, metasearch engines, desktop search tools, and web portals and vertical market websites that have a search facility for online databases.
General:
Ask.com (known as Ask Jeeves in the UK)
Baidu (Chinese, Japanese)
Bing (formerly MSN Search and Live Search)
Blekko
Duck Duck Go
Google
Kosmix
Sogou (Chinese)
Yodao (Chinese)
Yahoo! Search
Yandex (Russian)
Yebol
3.Metasearch search engine A metasearch engine is a search tool that sends user requests to several other search engines and/or databases and aggregates the results into a single list or displays them according to their source. Metasearch engines enable users to enter search criteria once and access several search engines simultaneously. Metasearch engines operate on the premise that the Web is too large for any one search engine to index it all and that more comprehensive search results can be obtained by combining the results from several search engines. This also may save the user from having to use multiple search engines separately.
The term "metasearch" is frequently used to classify a set of commercial search engines, see the list of search engines, but is also used to describe the paradigm of searching multiple data sources in real time. The National Information Standards Organization (NISO) uses the terms Federated Search and Metasearch interchangeably to describe this web search paradigm.
Source:http://www.searchengineguide.com/jennifer-laycock/sem-101-what-is.php%22%3Ehttp://en.wikipedia.org/wiki/List_of_search_engines
">http://en.wikipedia.org/wiki/Metasearch_enginesource :
A search engine does exactly what its called - it searches certain parts of the internet database based on the words you are searching for information on. For example, if you want football stats, it's not gonna bother looking on Cosmopolitans website, and likewise if you wanted makeup hints, they wouldn't check NFL.com.
1.Directory search engine Most people are familiar with the concept of search engines these days. In fact, most Internet users turn to search engines on an almost daily basis to help locate information on a specific topic. Internet directories on the other hand are often overlooked, misunderstood and underappreciated by searchers looking for just the right site and by site owners looking to improve their traffic.
Often mistaken for search engines, directories are actually collections of human reviewed web sites that have been arranged into topical categories. Popular directories like Yahoo!, Best of the Web and Skaffe can serve as excellent starting points for navigating the Internet. They can also serve as a valuable resource for small business owners looking for ways to drive more traffic to their web sites.
2.General search engine
General search engines, including web search engines, selection-based search engines, metasearch engines, desktop search tools, and web portals and vertical market websites that have a search facility for online databases.
General:
Ask.com (known as Ask Jeeves in the UK)
Baidu (Chinese, Japanese)
Bing (formerly MSN Search and Live Search)
Blekko
Duck Duck Go
Kosmix
Sogou (Chinese)
Yodao (Chinese)
Yahoo! Search
Yandex (Russian)
Yebol
3.Metasearch search engine A metasearch engine is a search tool that sends user requests to several other search engines and/or databases and aggregates the results into a single list or displays them according to their source. Metasearch engines enable users to enter search criteria once and access several search engines simultaneously. Metasearch engines operate on the premise that the Web is too large for any one search engine to index it all and that more comprehensive search results can be obtained by combining the results from several search engines. This also may save the user from having to use multiple search engines separately.
The term "metasearch" is frequently used to classify a set of commercial search engines, see the list of search engines, but is also used to describe the paradigm of searching multiple data sources in real time. The National Information Standards Organization (NISO) uses the terms Federated Search and Metasearch interchangeably to describe this web search paradigm.
Source:http://www.searchengineguide.com/jennifer-laycock/sem-101-what-is.php%22%3Ehttp://en.wikipedia.org/wiki/List_of_search_engines
">http://en.wikipedia.org/wiki/Metasearch_enginesource :
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