iPhone 1.0. I was notoriously good at getting lost cause I'm not great with directions. A couple days after I got it, I was going somewhere in a city that isn't my own. I stepped off the train and pulled up the map app, looked at a couple of street signs, and said, "I'm going that way."

I thought to myself, this changes everything. Younger people who never had to rely on paper maps will never understand how profound that moment was.