I implement user interfaces and their actions when you tap or click them.
They'd see aircraft and space craft on the way into my office. But I don't always work in my office, I can work anywhere, anytime. They'd see me diagraming the structure of an application and using Photoshop to design interesting visuals for the app.
Here's the first step for college students
Take the highest level of math that you can.
"People said it was too late to get into computers, after all, the boys started in middle school."