
Introduction
A couple of years ago, I was preparing to speak in front of a group at a con-
ference. As I set up for the presentation, attendees slowly filled the room. I
connected my laptop computer to the projector screen and logged in.This
was my travel laptop. I password-protected my screensaver and set it to acti-
vate after just a few minutes of inactivity. And, of course, I had a ver