Here are some charts
that show the relative sizes of various interesting magnitudes.
Over 93 percent of the information produced in 1999 was in digital format.
New books published in US. (US Statistical Abstract 1999, Table 938.
Some years interpolated.)
Newspapers and periodicals published in US. (US Statistical Abstract
1999, Table 941.)
Print summary. (Calculations
Photo summary. (Calculations
Optical summary. (calculations
Total and unique information
on various types of hard drives. (Calculations by authors)
Worldwide PC hard drive capacity shipped. (1999 Winchester Disk Drive
Market Forecast and Review, Table C5, International Data Corporation
report. Some years forecast.)
Hard drive cost per gigabyte. (IDC reports.)
Trends in EMC's stock price, megabytes per inch, and cost per megabyte.
From Forbes, October
US household media use. (US Statistical Abstract 1999, Table 920.)
© 2000 Regents
of the University of California
by online households in the US during an average week, Q2, 2000. (Economist
Magazine, October 7, 2000, E-Entertainment Survey, page 11.)
Summary of upper
estimate of worldwide information production. (Economist Magazine,
Cost of transmitting
1000 words v Number of words available in USA 1960-1980. (Ithiel de
Sola Pool, Hiroshi Inose, Nozomu Takasaki, Roger Hurwitz, Communication
Flows: A Census in the United States and Japan, Elsevier Science
Publishers, New York, 1984.)