The world is saving over 295 exabytes of data

Science (Science) has just published a study that said that by the end of 2007 the world had stored about 295 exabytes of data (1 exabyte = 1 billion GB) through more than 60 different methods. such as hard drives, DVDs or printed books, but the amount of digitized data accounts for 94% of all human data.

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The researchers figured it out figuratively, if this amount of data is printed into books, the number of books will cover the entire area of ​​China and 13 layers thick. If you put this amount of data stored on a CD, this stack of disks will be as tall as the distance from the earth to . the moon.

According to the research team, this is essentially just the amount of data stored between 1986 and 2007 and this is the clearest evidence for the revolution of ' information explosion ' that the world spent the past few years. If in 2000, about 75% of the world's data was still stored by analog technology (cassette tape, video tape .) then in 2007, the storage rate by digital technology (hard disk drive .) was is 94%.

As of 2010, there are about 2 zettabytes of data per day (1 zettabyte = 1,000 exabytes) distributed around the world or, on average, every person in the world will have to read about 175 newspapers a day. However, the digital gap between rich and poor countries in the world is also increasing sharply, the researchers said. In 2002, the amount of information that a person in a rich country received was 8 times more than that of a poor country. In 2007, this gap was 15 times.