American Scientist - Computing Science

American Scientist - Computing Science

In my hand I hold a metal box, festooned with labels, serial numbers, bar codes and tamperproof seals. Inside the box is everything I have written over the past 10 years—articles, a book, memos, notes, programs, letters, e-mail, shopping lists. And there’s still plenty of room left for everything I might hope to write in the next 10 years. For an author, it’s a little humbling to see so much of a life’s work encompassed in a tin box just big enough for a couple dozen pencils.

The metal box, of course, is a disk drive. And it’s not even the latest model. This one is a decade old and has a capacity of 120 megabytes, roughly equivalent to 120 million characters of unformatted text. The new disk that will replace it looks much the same—just a little slimmer and sleeker—but it holds a thousand times as much: 120 gigabytes, or 1.2 x 1011 characters of text. That’s room enough not only for everything I’ve ever written but also for everything I’ve ever read. Here in the palm of one hand is space for a whole intellectual universe—all the words that enter a human mind in a lifetime of reading.