Given that this piece was written in 1945, Vannevar Bush's description of the next step in scientific documentation was very close to what the Internet is today. In fact I think my favorite part of the article is the following quote:
"A record if it is to be useful to science, must be continuously extended, it must be stored, and above all it must be consulted. Today we make the record conventionally by writing and photography, followed by printing; but we also record on film, on wax disks, and on magnetic wires. Even if utterly new recording procedures do not appear, these present ones are certainly in the process of modification and extension."
The first sentence is pretty much what the Internet is on a very basic level for everything, not just science (or at least what Google hopes to do). But I think the Internet is both a new recording procedure and an extension to the older recording procedures - it's still based on writing and photography, but the Internet is a way to record people's lives in a variety of different ways. Social media is an example of this: Facebook, LinkedIn, Twitter, and the myriad of social networks in existence all record different aspects of people's lives.
The other part that really stood out to me was the discussion of association and the memex. Bush states that "[m]an cannot hope fully to duplicate this mental process artificially, but he certainly ought to be able to learn from it". Both of these concepts tie heavily into search engines, SEO, and tagging - in order to build better results, search results associate certain terms with each other to return better results. There's even a bit about search history! (though the part about giving the history to someone else to try in their memex is interesting because doing so today on the Internet would more or less give them your results)
Bush didn't get everything right, but he was scarily accurate about the future