The 10 search feature more useful and interesting Google

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Now all time we realized that Google can no longer be considered a simple search engine, but rather a genuine source of ideas and innovative services that are continually released, so that often becomes difficult to even stay up to date and informed on all.
The problem but I think today is felt more and more (and Google, as we shall see, is trying to remedy) is that the greater the amount of information indexed, the more it becomes necessary to provide tools and ways to can make targeted searches that achieve consistent results, excluding possible as the mountain of garbage that unfortunately stumbled often and willingly.

In this article I will list the 10 most useful features and curious that the search engine Google is offering more than the normal search by keywords:

Search by logical
In any keyword search, you can also specify the alternative words (OR Boolean) or negative (NOT Boolean). This possibility is very little used and often underestimated, while it would be useful in many cases, such as for example when you want to search for information about Paris in Italian or other languages (OR operator: "paris | Paris") get on without myriad sites devoted to Paris Hilton (NOT operator: "-hilton):
- paris | paris-hilton
Search by type of file
Represents the typical case where you are looking for a specific document, manual PDF, Excel or Powerpoint.
Google allows you to perform searches targeted exclusively within certain types of documents using the "filetype:" they appear to be very useful in all those situations where there is a need to gather material and case studies on specific topics:
Research focused on school or university
If you want to restrict search results only to school / university you can try using the dedicated service of Google: Google Search School. Or is also interesting to try to limit your search on Google to websites. "Edu" by the "site:"
- service oriented architecture filetype: pdf site: edu
Dictionary
Through the "define:" You can educate so that Google returns results related only to sites that provide definitions of terms such as Wikipedia or sites which contain a "glossary"
- define: peer to peer
Calculator
If instead of specifying a number of search terms, Google put on a mathematical expression in any way similar to what you do when using the calculator of Windows, this will be immediately recognized as such and resolved:
- 26 * 9000
- sin (90) / cos (90)
Currency conversion
Similar to the previous features, Google is also able to function as a currency converter. E 'enough that you use the following syntax in the form of research:
- 1 USD in GBP
- 1 EUR in INR
Finding faces
On Google Images is a feature not documented that we have talked long ago: in your search by adding the parameter "imgtype = face" will appear in the results only images containing only human faces. Try the two links below to see the difference in results to be obtained:
- http://images.google.com/images?q=paris
- http://images.google.com/images?q=paris&imgtype=face
Everything about cinema
Google is turning a variety of features (some still do not return results for Italy) Specific research related to the world of cinema ranging from research reviews of the possibility of seeking the films scheduled in various cities:
- movie: The Matrix
- http://www.google.com/movies
All about music
Thanks to the "music" can be obtained only limited information to the world of music with a review of albums and songs:
- music: Vasco Rossi
Search for sites containing ebook, MP3 and film
By combining in a timely and "cunning" players "inurl:", and "intitle:" You can perform searches targeted the contents of the directory server that Apache was (usually wrongly) configured so as to allow browsing Hard Disk: more often than not these directories contain significant amounts of ebook, music, fimati or: