History of Conic Sections
http://mathworld.wolfram.com/ConicSection.html
http://xahlee.org/SpecialPlaneCurves_dir/ConicSections_dir/conicSections.html
http://math2.org/math/algebra/conics.htm
http://www-groups.dcs.st-and.ac.uk/~history/Curves/Curves.html
http://en.wikipedia.org/wiki/Conic_section
http://en.wikipedia.org/wiki/Category:Conic_sections
History of Circle
http://www-history.mcs.st-and.ac.uk/history/Curves/Circle.html
History of Parabola
http://www-history.mcs.st-and.ac.uk/~history/Curves/Parabola.html
History of Ellipse
http://www-history.mcs.st-and.ac.uk/~history/Curves/Ellipse.html
History of Hyperbola
http://www-history.mcs.st-and.ac.uk/history/Curves/Hyperbola.html
Applications of the Conic Sections
http://en.wikipedia.org/wiki/Astronomy
http://www.dean.usma.edu/math/people/rickey/class/conics.html
http://www.comath.com/problems/conic/conic.html
http://mathcentral.uregina.ca/RR/database/RR.09.95/weston1.html
http://mtl.math.uiuc.edu/users/E1Lagle/conics.html
Illustrative Problems on the Four Conic Sections
http://www.krellinst.org/UCES/archive/resources/conics/newconics.html