Today’s lecture halls are filled with iPads, Apple “pencils,” MacBooks, cellphones, and smart watches. There was a time, however, when just the thought of a computer helping you with your trigonometry homework was out of this world.

Today’s lecture halls are filled with iPads, Apple “pencils,” MacBooks, cellphones, and smart watches. There was a time, however, when just the thought of a computer helping you with your trigonometry homework was out of this world.