Apart from the known web, there is a deep web that is not indexed by search engines and in order to reach out there one should have access to them through password. This Deep Web is considered to be nearly 91,000 terabytes whereas open web if compared is just 167 terabytes. Only Library of congress is whopping 3,000 terabytes.

•DeepPeep : It searches through forms that query databases and web services for information. By indexing databases, DeepPeep can track 45,000 forms across 7 domains. The domains covered by DeepPeep (Beta) are Auto, Airfare, Biology, Book, Hotel, Job, and Rental. Being a beta service, there are occasional glitches as some results don’t load in the browser.

deeppeep

• IncyWincy: It behaves like Meta search engine by tapping into other search engines and filtering results. It can search web, directory, form and images.

incywincy

• Complete Planet: this search engine even calls itself to the ‘front door to the Deep Web’. This directory resource makes it easy to access the mass of dynamic databases expanded to a general purpose search. The databases indexed by Complete Planet number around 70,000 and range from Agriculture to Weather.

• Infoplease : It is an information portal provided with a good number of features. By using this site one can get into a good number of encyclopedias, almanacs, atlas and biographies.

• DeepWebTech : DeepWebTech is subdivided into five search engines and browser plugins as for specific purposes and reasons. It covers area like science, medicine and business.

• Scirus: This search engine is entirely focused towards scientific discoveries and innovations. Its searching algorithm can search out journals, scientists, homepages, courseware, pre-print server material, patents and institutional intranets.

• TechXtra : This search engine is devoted to the topics like engineering, mathematics and computing. It provides an information seeker news and information about news, job announcements, technical reports, technical data, full text e-prints, teaching and other learning resources.

• Infomine : It is a collection of libraries in the United States. Some of the prominent libraries in the list are University of California, Wake Forest University, California State University, and the University of Detroit. It fetches information from databases, electronic journals, electronic books, bulletin boards, mailing lists, online library card catalogs, articles, directories of researchers, and many other resources.

•The WWW Virtual Library: This is considered to be the oldest catalog on the web. For searching data into it, you can go vertically into the categories or use the search bar.

• Intute : It is a UK centric search engine and provides information from the most esteemed universities from the region to study and research. You can search topic by keyword search for academic topics like agriculture to veterinary medicine.

intute

Above search methods definitively one would found of great help for a deeper web search.