In calculus, an
antiderivative, primitive, or indefinite integral of a function f is a function F whose derivative is equal to f,
i.e., F ′ = f. The process of solving for antiderivatives is antidifferentiation (or indefinite integration).
Antiderivatives are related to definite integrals through the fundamental theorem of calculus: the definite
integral of a function over an interval is equal to the difference between the values of an antiderivative
evaluated at the endpoints of the interval. - Wikipedia
When this page was first created back in the late 1990s, it was nearly impossible to locate tables of integrals
(both definite and indefinite) on the Internet. Now, they are everywhere; being one of the first doesn't count for
much on the Web.