Tips & Tools
- Internet Search Tips by Gwern
- [Google Search Operators](https://ahrefs.com/blog/google-advanced-search-operators/
- Refine Google Searches
Search engines
- RefSeek
- Marginalia Search
- Google Advanced Search
- Build your own search engine with Google Programmable Search Engine.
Resources to find resources
Reference sources
Dictionaries
- Merriam-Webster
- dictionary.com
- The Free Dictionary
- OneLook Reverse Dictionary
- Urban Dictionary
- Urban Thesaurus
- The Online Slang Dictionary
Encyclopedias
- Encyclopedia Britannica
- Wolfram|Alpha
- Wikipedia
Academic research
Primary sources
- Internet Archive
- Library of Congress
- Smithsonian Institution
- Europeana Collections
- Perseus Digital Library
- The WWW Virtual Library
- World Digital Library
- JSTOR Home
- Quote Investigator
- Wikiquote
- Symbols
Books
Trends
- Google Ngram. When you enter phrases into the Google Books Ngram Viewer, it displays a graph showing how those phrases have occurred in a corpus of books over the selected years.