Science article calculates the world’s total technological capacity
LOS ANGELES Feb. 10, 2011
Feb. 10 Science Express Science
So how much information is there in the world? How much did this grow over two decades?
Prepare for some big numbers:
- In 2007, humankind sent 1.9 zettabytes of information through broadcast technology such as televisions and GPS. That’s equivalent to every person in the world receiving 174 newspapers every day.
- the United States
- Looking at both digital memory and analog devices, humankind can store at least 295 exabytes of information. (That’s a number with 20 zeroes in it.) Put another way, if a single star is a bit of information, that’s a galaxy of information for every person in the world.
- 2002 was the beginning of the digital age, the first year in history that digital storage capacity overtook analog capacity. As of 2007, almost 94 percent of our memory is in digital form.
- In 2007, all the general-purpose computers worldwide computed 6.4 x 10^18 instructions per second. This is in the same general order of magnitude as the number of nerve impulses executed by the human brain in a single second.
Martin Hilbert http://www.vimeo.com/album/1527374 . Password is: trojan.
University of Southern California