Operator :site
Description: restricts results to sites within the specified domain
Sample query:site:delphinoy.com delphi will find all sites containing the word delphi, located within the *.delphinoy.com domain

Operator: intitle
Description: restricts results to documents whose title contains the specified phrase
Sample query: intitle:delphi philippines will find all sites with the word delphi in the title and philippines in the text

Operator: allintitle
Description: restricts results to documents whose title contains all the specified phrases
Sample query: allintitle:delphi philippines will find all sites with the words delphi and philippines in the title, so it’s equivalent to intitle:delphi intitle:philippines

Operator: inurl
Description: restricts results to sites whose URL contains the specified phrase
Sample query: inurl:delphi will find all sites containing the word philippines in the text and delphi in the URL

Operator: allinurl
Description: restricts results to sites whose URL contains all the specified phrases
Sample query: allinurl:delphi philippines will find all sites with the words delphi and philippines in the URL, so it’s equivalent to inurl:delphi inurl:philippines

Operator: filetype, ext
Description: restricts results to documents of the specified type
Sample query: filetype:pdf philippines will return PDFs containing the word philippines , while filetype:xls delphi will return Excel spreadsheets with the word delphi

Operator: numrange
Description: restricts results to documents containing a number from the specified range
Sample query: numrange:1-100 delphi will return sites containing a number from 1 to 100 and the word delphi. The same result can be achieved with 1..100 delphi

Operator: link
Description: restricts results to sites containing links to the specified location
Sample query: link:www.delphinoy.com will return documents containing one or more links to www.delphinoy.com

Operator: inanchor
Description: restricts results to sites containing links with the specified phrase in their descriptions
Sample query: inanchor:delphi will return documents with links whose description contains the word delphi(that’s the actual link text, not the URL indicated by the link)

Operator: allintext
Description: restricts results to documents containing the specified phrase in the text, but not in the title, link descriptions or URLs
Sample query: allintext:"delphi philippines" will return documents which contain the phrase delphi philippines in their text only

Google explained that  Tuesday’s widespread outage occurred when the company took some servers offline to perform their scheduled routine maintenance. This  caused  its remaining routers to become overloaded with traffic.

Ben Treynor, a Google vice president of engineering apologized on their blog ““Thus, right up front, I’d like to apologize to all of you — today’s outage was a Big Deal, and we’re treating it as such,”. He wrote” We’ve turned our full attention to helping ensure this kind of event doesn’t happen again. Some of the actions are straightforward and are already done — for example, increasing request router capacity well beyond peak demand to provide headroom”.

Twitter users were trading updates about Gmail’s problems and became the a top trending topic on that day.

Google reported Tuesday afternoon that it fixed the problem.