so today i'm going to share with you some info about a new kind of search engine . Called SHODAN
there are many kind of search engines like :
Google(best search engine ever),yahoo,bing,Duck Duck Go(my 2nd hot favorite),Guruji.com(my favorite mp3 searcher) etc but, there is big difference here (shodan) . Shodan search the main computer's ip address and other information for example if we search Apache , that will collect the list of Apache servers with it's ip address ! and with other information to check that ip is online or offline simply type in cmd ping "ip address"