2. Name- Google, because it
is a common spelling of googol, or 10100 and fits well
with our goal of building very large-scale search

3. 1. Google is a prototype of a large-scale search
engine which makes heavy use of the structure
present in hypertext.
2. Google is designed to crawl and index the Web
efficiently and produce much more satisfying
search results than existing systems.
3.large-scale search engine which addresses many of
the problems of existing systems. It makes
especially
heavy use of the additional structure present in
hypertext to provide much higher quality search
results

4. How Google Works
Google consists of three distinct parts, each of which is run on a
distributed network of thousands of low-cost computers and can
therefore when we enter a query.
1.carry out fast parallel processing -
Parallel processing is a method of computation in which many
calculations can be performed simultaneously, significantly speeding
up data processing
.
2. Googlebot- a web crawler that finds and fetches web pages.
The indexer that sorts every word on every page and stores the
resulting index of words in a huge database.
3. The query processor, which compares your search query to the
index and recommends the documents that it considers most

5. 1. The web server sends the query to
3. The search results are returned to
the index servers. The content inside
the user in a fraction of a second.
the index servers is similar to the index
in the back of a book--it tells which
pages contain the words that match any
2. The query travels to the doc particular query term
servers, which actually retrieve the
stored documents. Snippets are
generated to describe each search
result.
Copyright

6. crawling
technology is needed to gather the web documents and keep them up to date.
Storage space must be used efficiently to store indices and, optionally, the
documents
themselves.
indexing
The indexing system must process hundreds of gigabytes of data efficiently. Queries
must be handled quickly, at a rate of hundreds to thousands per second.
.
Google is designed to scale well to extremely large data sets. It makes
efficient use of storage space to store the index.
Its data structures are optimized for fast and efficient access Further,
we expect that the cost to index and store text or HTML will eventually
decline relative to the amount that will be available This will result in
favourable scaling properties for centralized systems like Google.

7. The Google search engine has two important features that help it
produce high precision results.
First it makes use of the link structure of the Web to calculate a
quality ranking for each web page. This ranking
is called PageRank.
Second Google utilizes link to improve search results.

8. PageRank: Bringing Order to the Web
The citation (link) graph of the web is an important resource that has largely gone
unused in existing web search engines.
they have created maps containing as many as 518 million of these hyperlinks These
maps allow rapid calculation of a web page’s "PageRank", an
objective measure of its citation importance that corresponds well with people’s
subjective idea of importance Because of this correspondence, PageRank is an
excellent way to prioritize the results of web keyword searches For most popular
subjects, a simple text matching search that is restricted to web
page titles performs admirably when PageRank prioritizes the results For the type of
full text searches in the main Google system, PageRank also helps
a great deal.

9. Anchor Text
The text of links is treated in a special way in our search engine. Most search
engines associate the text of a link with the page that the link is on. In addition,
we associate it with the page the link points to.
This has several advantages.
First, anchors often provide more accurate descriptions of web pages than
the pages themselves.
Second, anchors may exist for documents which cannot be indexed by a
text-based search engine, such as images, programs, and databases. This makes it
possible to return web
pages which have not actually been crawled. Note that pages that have not been
crawled can cause
problems, since they are never checked for validity before being returned to the
user. In this case, the
search engine can even return a page that never actually existed, but had
hyperlinks pointing to it.
However, it is possible to sort the results, so that this particular problem rarely
happens.

10. Aside from PageRank and the use of anchor text, Google has
several other features.
First- it has location information for all hits and so it makes
extensive use of proximity in search.
Second- Google keeps track of some visual presentation details
such as font size of words. Words in a larger or bolder font are
weighted higher than other words.
Third- full raw HTML of pages is available in a repository.

12. The Google Advanced Search is of course applicable to
texts, terms, files and so on. In that
way is possible to do an advanced search in texts with
following terms:
• Idioms
• Format file
• Domains
• Books
• Codes

13. Figura 1: Google Advanced Image Search

14. 1. Parse the query.
2. Convert words into wordIDs.
3. Seek to the start of the doclist in the short barrel for every word
4. Scan through the doclists until there is a document that
matches all the search terms.
5. Compute the rank of that document for the query.
6. If we are in the short barrels and at the end of any doclist, seek
to the start of the doclist in the full barrel for every word and
go
to step 4.
7. If we are not at the end of any doclist go to step 4. Sort the

16. What is a query? It's a request for information from a search
engine. A query consists of one or more words, numbers, or phrases
that you
hope you will find in the search results listings.
To enter a query, type in descriptive words into Google's search
box. You can use either the search box on Google's home page
(shown above) or the search box that always appears at the top of
a Google results page .
Now press the ENTER key or click on the "Google Search" button to
view your search results, which include links to pages that match
your
query along with relevant snippets (excerpts) with your search
terms in a boldface

17. Search within results
You can get the same results in one step fewer by simply specifying additional terms to
your previous query.
On Internet Explorer and on some other browsers, you can double click on a term to
highlight it. Then type a new term or hit the
DELETE key to remove the term. Triple click in the search box to highlight your entire
query. Enter a new query or hit the DELETE key to
remove the old query.
l Instead of searching for related topics with a single query, divide the query into several
parts. Looking for a job? By searching for tips on
each aspect, you'll find more sites than by searching for sites that describe all the aspects
of a job search

18. Google Earth is very famous interactive application mapping program powered
by satellite and
aerial imagery that covers the vast majority of the planet.
Google Earth is generally considered to be remarkably accurate and extremely
detailed. Many major cities in the planet have such detailed images that one can
zoom in close enough to see vehicles and pedestrians clearly. Consequently
there have been some concerns about national security implications in despite of
the images has
been not updated constantly.
Google has many others products through the Google Labs not
released yet due it are still being tested for use by general public.
One good differential on Google Search is regarding to logic engine based on
Boolean Logic
created by mathematician Britain George Boole. Therefore the Google engine allows
finding words,
texts and so on using logic values conditioned to:
• The value must be true or false
• The value must not be true and false at same time
• If true, it is defined as 1 and if false it is defined as 0(zero

19. Now we came to Google Desktop (2) is desktop search software
made by Google for Mac OS X,
Linux, and Microsoft Windows. The program allows text searches of
a user's e-mails, computer files,
music, photos, chats, Web pages viewed, and other "Google
Gadgets."
Google Desktop have the following features:
File indexing: After initially installing Google Desktop, the
software completes an indexing
of all the files in the computer And after the initial indexing is
completed, the software
continues to index files as needed. Users can start searching for
files immediately after
installing the program. After performing searches, results can also
be returned in an Internet
browser on the Google Desktop Home Page much like the results
for Google Web searches.

21. • Sidebar: Screenshot of gadgets. Google Desktop running on Microsoft Windows
Vista. A
prominent feature of Google Desktop is the Sidebar, which holds several common
Gadgets
and resides off to one side of the desktop. The Sidebar is available with the
Microsoft
Windows version of Google Desktop only. The Sidebar comes pre-installed with the
following gadgets:
Email - a panel which lets one view one's Gmail messages.
Scratch Pad - here one can store random notes; they are saved automatically
Photos - displays a slideshow of photos from the "My Pictures" folder .
News - shows the latest headlines from Google News, and how long ago they were
written. The News panel is personalized depending on the type of news you read.
Weather - shows the current weather for a location specified by the user.
Web Clips - shows recent posts from RSS news feeds.
Google Talk - If Google Talk is installed, double clicking the window title will dock
it to one's sidebar

22. Quick Find: When searching in the sidebar, deskbar or floating
deskbar, Google Desktop
displays a "Quick Find" window. This window is filled with 6 (by
default) of the most relevant
results from one's computer. These results update as one types so
that one can get to what
one wants on one's computer without having to open another
browser window.

23. Deskbars: Deskbars are boxes which enable one
to type in a search query directly from
one's desktop. Web results will open in a browser
window and selected computer results will
be displayed in the "Quick Find" box (see above). A
Deskbar can either be a fixed deskbar,
which sits in one's Windows Taskbar, or a Floating
Deskbar, which one may position
anywhere one wants on one's desktop.

26. THANK YOU