A group of two or more connected computers that are able to share files, information, and other resources. Two or more connected networks yield either an intranet or an internet. The Portable Document Format allows desktop publishers to create print-ready electronic documents that maintain their original design or appearance when they are viewed or printed, regardless of the type of hardware used. To view or print a PDF file, the user must have document reader installed. A query is a list of specifications that a user enters into a search engine in order to retrieve specific information or web pages.
Many search engines use Boolean operators in order to enhance searching capabilities.
A website or other mechanism that allows the user to retrieve specific websites and web pages by entering different queries. Search engines typically look for specific occurrences of the terms that are entered into the search field. General search engines look for information across the entire World Wide Web, specialized search engines look for information within a specific subject area, and site-specific search engines look for information within a particular website. Subject directories often contain top-level general categories that are further divided into subcategories. Two popular subject directories are the World Wide Web Virtual Library and the Internet Public Library.