I remember it like it was yesterday, but it was 20 years ago. As I approached my boss’s desk, I saw her do something amazing: she made a smaller window appear on top of her screen, displaying the icons of her open applications. She quickly toggled and selected another. In an instant, she’d gone from Outlook to Excel. No mousing around, no hunting to open the app. I squawked. What the heck was that? That, my friends, was my alt-tab Eureka! moment.