Copyright
 More than 300TB of print material each year (books,
journals, newspapers, magazines)
 More than 25TB of Movies each year
 About 375,000TB of Photography each year
 About 987TB of Radio each year
 About 8,000TB of TV each year
 More than 58TB of Audio CDs each year
 墜カand that doesn墜t include software (say, video games)
Or materials born-digital on the Web, etc墜カ

(from 墜How Much Information? 2003,墜 Peter Lyman & Hal Varian)