1. Wikipedia

    https://www.wikipedia.org/

    Wikipedia is a free online encyclopedia, created and edited by volunteers around the world and hosted by the Wikimedia Foundation.

  2. List of search engines - Wikipedia

    https://en.wikipedia.org/wiki/List_of_search_engines

    Search engines, including web search engines, selection-based search engines, metasearch engines, desktop search tools, and web portals and vertical market websites have a search facility for online databases.

  3. Wikipedia, the free encyclopedia

    https://en.wikipedia.org/wiki/Main_Page

    Help desk – Ask questions about using or editing Wikipedia. Reference desk – Ask research questions about encyclopedic topics. Content portals – A unique way to navigate the encyclopedia.

  4. Search engine - Simple English Wikipedia, the free encyclopedia

    https://simple.wikipedia.org/wiki/Search_engine

    Learn what a search engine is, how it works, and how to use it. Find out the most popular and specialized search engines, and how they rank and index web pages.

  5. Search engine (computing) - Wikipedia

    https://en.wikipedia.org/wiki/Search_engine_(computing)

    In computing, a search engine is an information retrieval software system designed to help find information stored on one or more computer systems. Search engines discover, crawl, transform, and store information for retrieval and presentation in response to user queries. The search results are usually presented in a list and are commonly ...