History of Multivariable Calculus
http://www.maa.org/taxonomy/term/40373/0
enA Vector Approach to Ptolemy's Theorem
http://www.maa.org/programs/faculty-and-departments/classroom-capsules-and-notes/a-vector-approach-to-ptolemys-theorem
<div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even"><em>Ptolemy's Theorem states that the product of the diagonals of a cyclic quadrilateral (a quadrilateral that can be inscribed in a circle) is equal to the sum of the products of the opposite sides. The authors give a new proof making use of vectors.</em></div></div></div>ENIAC simulation: history: Trajectory calculation
http://www.maa.org/programs/faculty-and-departments/course-communities/eniac-simulation-history-trajectory-calculation
How Euler Did It: Mixed Partial Derivatives
http://www.maa.org/programs/faculty-and-departments/course-communities/how-euler-did-it-mixed-partial-derivatives