"Cities where I'm from have... different design philosophies. It's interesting."
"It varies. The dropoff between city and no city tends to be more gradual, that's the main trend I'm thinking of."
"Oh, uh, this country doesn't have a military, at all, so if we're threatened in some way Parliament can raise the wards over all the cities at once, and city governments can do their own too, and individual buildings have to have wards even if they're not inside city limits. They're not like the one you were in," she adds hastily, "they keep stuff out, not in."
"If I thought you had a communications network that compared to what I'm used to at home, I might want the equivalent of a PADD, but I'm guessing you don't."
"I could try to explain, but I don't know how much background knowledge you're missing."
"All right... start from paper, I've seen that here. From paper you get to books, right? Okay, now say there's an artifact that's like a library in book form - it contains the information of hundreds or thousands or millions of books, and you can cue it to show you the ones you want, one page's worth of display at a time. And you can write on it, record new books into the library. And any two of these things can talk to each other, swap books back and forth. And there's a semi-centralized network so you don't have to physically find the exact one that has the information you want, you can just go on the network and find it from wherever you are. There's a lot more to it, but that's the basics."