Editorial Observer: Trying to Measure the Amount of Information That Humans Create: "Do you know what an exabyte is? I didn't until I started reading a new report, called 'How Much Information? 2003,' from the University of California at Berkeley's School of Information Management and Systems. An exabyte turns out to be a billion gigabytes. Most new computers, by comparison, come with hard drives around 40 to 100 gigabytes in size.
The authors of the report estimate that in 2002 the human species stored about five exabytes of new information on paper, film, optical or magnetic media, a number that doubled in the past three years. Five exabytes, as it happens, is equivalent to all words ever spoken by humans since the dawn of time.
To gauge how much new information humans now produce in a given year, you have to imagine digitizing and storing all of it, including forms of information that aren't already digital and forms that aren't usually stored, including all e-mail messages, all the Web pages on the entire Internet and all telephone conversations. "