How Much Information is There?

How much information is there? Not counting books, just the digital information storage.

For most of us, “a crapload” is a sufficiently accurate answer. But for a few obsessive data analysts, more precision is necessary. According to a recent study by market-research company IDC, and sponsored by storage company EMC, the size of the information universe is currently 800,000 petabytes. Each petabyte is a million gigabytes, or the equivalent of 1,000 one-terabyte hard drives.

If you stored all of this data on DVDs, the study’s authors say, the stack would reach from the Earth to the moon and back.