Google has introduced graphing functionality to Google Search which allows users to enter mathematical functions directly into the search box.

Kenneth F. Andersen, Weighted Norm Inequalities for Hilbert Transforms and Conjugate Functions of Even and Odd Functions, Proceedings of the American Mathematical Society, Vol. 56, No. 1 (Apr., 1976), ...

Ivan Baggs, Functions with a Closed Graph, Proceedings of the American Mathematical Society, Vol. 43, No. 2 (Apr., 1974), pp. 439-442 ...