The Mahalo Top 7
- Wolfram Mathworld: Pi and Pi Formulas
- Wikipedia: Pi
- Official Site: Pi Day
- BBC: 5 Numbers: Pi
- Project Gutenberg: Value of Pi to One Million Digits
- The Pi-Search Page
- Google Video: The Story of π (Time: 3:15)
News and Articles About Pi
- Google News: Pi
- news@Nature: Pi Day celebrated
(2007)
- Plus Magazine: Pi not a piece of cake (2002)
- Science News Online: Pi à la Mode (2001)
- Carnegie Mellon University: Pi: A 2000-Year Search Changes Direction (1996)
History of Pi
- Wikipedia: History of Pi
- MacTutor History of Mathematics: Pi Chronology
- Harry J. Smith: Brief History of Pi Calculations
- Purdue University: Text of Indiana Legislature Attempting to Mandate Pi = 3.2 in 1897
Notable Figures in Pi Research
- Wikipedia: Ahmes
- Milan Milanović: John Machin
- Calculus: Johann Heinrich Lambert
- MacTutor History of Mathematics: Ferdinand von Lindemann
- Did You Ever Wonder?: David Bailey
- Wikipedia: Yasumasa Kanada
Pi Fun Stuff
- wikiHow: How to Calculate Pi by Throwing Frozen Hot Dogs
- TeachPi.org: The Pi Rap: Lose Yourself (In The Digits)
- PiNation.com
- Ball and Claw: The Most Useless Pi Algorithm
- Pi Land: Pi Trivia Game
Pi Research
- Wikipedia: Computing Pi
- Wolfram MathWorld: Pi Digits and Pi Approximations
- Simon Fraser University: Ramanujan, Modular Equations, and Approximations to Pi
Pi Education Resources
- TeachPi.org
- Howstuffworks: How Pi Works
- Wolfram MathWorld: Pi Wordplay
- Eve Andersson: Pi Land
- Exploratorium: Pi Activity: Cutting Pi and Hat Sizes
Pi in Popular Culture
- Google Image Search: Pi
- Lars Erickson: Pi Symphony
- Wislawa Szymborska: A Poem On Pi
- IMDb: Pi (1998)
Pi Books and Publications
- Amazon.com: Pi Books
- Amazon.com: Pi: A Source Book
- Amazon.com: Contact by Carl Sagan
- David Blatner: The Joy of Pi
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