Basically the title. The fact that we can read an encyclopedia entry on the economic history of the Netherlands from our phone is crazy. Scrolling over to a random island in the middle of the Atlantic to experience a virtual street tour is insane. There are even websites that let you see live security camera footage (shoutout to EarthCamTV). We have so much information that we take for granted.
It's also crazy that you can grab a phone book (if those even still exist) from the other side of the world, just call a number over there and speak with person you would've never met otherwise.
When I was a trainer I had a 2-week class for AT&T customer service reps. The shear amount of BS involved in long distance calling and billing was overwhelming.
Know the terms intralec and interlec? (sp?) Good. You don't have to.
Two weeks? Our At&t training was three months for phone service, and another one to two months for combined.