In response to a question on the ID-Cafe list, Loren Needles has pointed to a really interesting study from UC Berkeley called How much information? 2003. This study is part of an ongoing effort to estimate how much information is created each year.

Here are some highlights from this year's report:

• Print, film, magnetic, and optical storage media produced about 5 exabytes of new information in 2002. Ninety-two percent of the new information was stored on magnetic media, mostly in hard disks.
• We estimate that the amount of new information stored on paper, film, magnetic, and optical media has about doubled in the last three years.
• Information flows through electronic channels -- telephone, radio, TV, and the Internet -- contained almost 18 exabytes of new information in 2002, three and a half times more than is recorded in storage media. Ninety eight percent of this total is the information sent and received in telephone calls - including both voice and data on both fixed lines and wireless.

The snippets don't do the report justice, in part because the report itself provides lots of useful ways to put the data in context. For example, "five exabytes of information is equivalent in size to the information contained in half a million new libraries the size of the Library of Congress print collections." Yowsa!

Speaking of which, it seems worthwhile to pull out a link to Roy Williams' data powers of ten. I couldn't find the live version on Roy's site, so am pointing to the UC Berkeley version instead. Keep it in mind when you want to know the difference between a petabyte and a yottabyte :)

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