If you are registered to Google and entered into the system, then yes, all that you have searched with Google, will be recorded in the history of the search. If you are not logged in or registered, but have not logged in, the data on search will not be logged. If you use services such Google, like Gmail, Picasa, iGoogle, Google Groups, or Adwords, you have an existing registration.
Providers of other popular search engines such as Yahoo, Microsoft and AOL, do not say (or do not confess?) That they keep a record of search history for each individual user, while at the same time they keep statistics on search data aggregated level. The author believes that they are a magazine dealing with IP addresses and search terms, but do not store information that could be used to associate the event search to specific users or user accounts.
Some providers of search (namely, Google and Microsoft), pledged to make data anonymous after finding 18 – 24 months of obfuscation by IP addresses, delete cookies and other identifiers from search terms. According to the author, using the search engine the user has no way to completely avoid logging search history, but one option, when used in a program of anonymity.
By the way, do not confuse the story of a search engine and search history in your browser. Completely separate from the logging and tracking of activities occurring on the server search engines, your browser also keeps a list you type search queries.
Who else is watching over you?
When you use the Internet, all the information you are looking for every web site you visit, even send and receive e-mails – all pass through the servers of your ISP. These servers have a complete picture of your World Wide Web, not just the story of your search for a particular search engine. And since you are a client of the service provider, it has a unique opportunity to associate your IP address with your real name and physical location.
However, logs visited pages collected by the service provider is stored only for as long as they are needed to solve business problems, such as the resolution of differences in billing and market research. In addition, at the request of the U.S. government logs of Internet activity of users can be stored by providers for an additional 90 days in accordance with the law in 1996, Electronic Communication Transactional Records Act. Being a non-ideal for the user, the policy of delay records of Internet activity, however, is controlled and has a well-defined limits, designed to protect user privacy.
However, you should always take into account the human factor. Someone must have access to this data. We regularly learn about the medical workers who dig in the patient and transmit the dirty details of celebrity tabloid reporters.