Basic Boolean Searching Database searching is based on the principles of Boolean logic.
Boolean logic refers to the logical relationship among search terms.
It is named for the British mathematician George Boole. Tutorials A subject directory useful for locating tutorials on the web for subjects from mathematics to computers to business. How to Choose a Search Engine or Directory From the University at Albany Libraries, this site provides quick reference on which search engines are best for which types of information. This site has tables of features of recommended search engines and subject directories, with some helpful information on constructing searches in each. There is also general information about the Internet and search tools.