7). The WWW Virtual Library (Vlib.org)
This is also a Deep Web Search Engine with a very much vast Database. You can browse through a lot of categories which includes Agriculture, Information and Libraries, Computing and Computer Science, Regional Studies and much more. This is also one of the oldest deep web search engine on the Internet.
So, let us quickly make use of the WWW Virtual library as an Example. In the Computing and Computer Science Section, I searched for ‘Internet’ and it’s displaying the results as shown in the following screenshot. I noted that I took some time longer than usual to find the results.
8). Wolfram Alpha: Computational Knowledge Engine
This Deep Web Search Engine one of the Best ever website I have ever found on the Internet which impressed me in the first visit. As mentioned, it is computational knowledge search engine which will show you the results based on the things related to calculation and computational things. On the official homepage, there have given a lot of things that we can do with Wolfram Alpha. Some of them are mentioned below.
Mathematics, Step by Step Solutions, Statistical & Data Analysis, History, Media, Finance, Physics, Engineering, Geography, Chemistry, Education, Web and Computers and much more. Here is an example search made in the Mathematics section of the Wolfram Alpha Deep Web Search Engine.
9). Google Books (books.google.com)
Google Books may also be considered as one of the biggest deep web database. Google Books contains the collection of thousands of full text books from all over the world libraries. It is a digital library of Works. According to a source, Google has scanned more than 25 million books which may be available via Google Books. You can image from this count how vast the library of Google books is. They have a lot of plans to scan as many books as they can.
The vastness of Google Books surprised. It may be called as the biggest collection of Books ever present in this world. Here below, I have added up a screenshot in which I have made a search on Google Books Deep Web Search Engine. I made this search, India. You can see it is displaying some full text books regarding the searched keyword India.