Karel J. Robot Java Edition by:
Joseph Bergin, Mark Stehlik, Jim Roberts, Richard Pattis
http://www.csis.pace.edu/~bergin/KarelJava2ed/Karel++JavaEdition.html

Valuable comments and suggestions from:
Dr. Joseph A Bergin, Department Of Computer Science,
Pace University
http://www.csis.pace.edu/~bergin/index.html

Valuable comments and suggestions from:
Dave Wittry, Computer Science Teacher, Troy High School
http://www.troyhigh.com/wittry/

Valuable comments and suggestions from:
Dr. Kathleen Bacer, Director of the Online Educational Technology
Azusa Pacific University
http://home.apu.edu/~kbacer/

Rain Drops Keep Falling On My Head
Collaborative Internet Project
Leonard Fretzin
http://lrs.ed.uiuc.edu/students/fretzin/CIPindex.html

PHP/MySQL Tutorial
© 1999 - 2001 David Gowans
http://www.freewebmasterhelp.com/tutorials/phpmysql/

Background information from:
The Monte Carlo Method Of Pi Calculation
http://www.chem.unl.edu/zeng/joy/mclab/mcintro.html

Background information from:
The Pi Pages
http://www.cecm.sfu.ca/pi/pi.html

Printable Adobe PDF Format Graphing Paper:
http://www.mathematicshelpcentral.com/graph_paper.htm and
http://www.printfreegraphpaper.com/

Tutorial on use of Semi-Logarithmic graph paper:
http://www.physics.uoguelph.ca/tutorials/GLP/index.html