The protractor and the Bunsen burner. Playing the recorder in music class. Drawing arcs and circles with a compass in geometry. These tools of the education trade become part of our lives for a ...

We are always impressed with something so simple can actually be so complex. For example, what would you think goes into an analog computer? Of course, a “real” analog computer has opamps that can do ...

A pertinent confession: I graduated from high school with the help of a machine. It was called a slide rule, a logarithmic device for solving daunting computations. Before digital calculators, it was ...