"Depends. I'm from 2007, but I've figured out that my Earth right then isn't like any other Earth at the same time, at least that I know about. None of the others have smartwheels or a Metaverse and the government in their Americas is still going.

"Mainframe, though, it's not a future thing. It's actually from ten years in my past. Or, well, maybe not mine. But it's a world inside a computer, and people travel around the Net from one system to another. Things work a little differently."