The Alan Sondheim Mail Archive

---------- Forwarded message ----------
Date: Mon, 7 Jul 2008 10:52:49 EDT
Subject: sizes of works,,sid5_gci944596,00.html
" Much of the following table is derived from figures calculated by Roy
Williams on his page called "Powers of Ten.""
Information object     How many bytes
A binary decision     1 bit
A single text character     1 byte
A typical text word     10 bytes
A typewritten page     2 kilobytes (KB s)
A low-resolution photograph     100 kilobytes
A short novel     1 megabyte ( MB )
The contents of a 3.5 inch floppy disk     1.44 megabytes
A high-resolution photograph     2 megabytes
The complete works of Shakespeare     5 megabytes
A minute of high-fidelity sound     10 megabytes
One meter (or close to a yard) of shelved books     100 megabytes
The contents of a CD-ROM     500 megabytes
A pickup truck filled with books     1 gigabyte ( GB )
The contents of a DVD     17 gigabytes
A collection of the works of Beethoven     20 gigabytes
A library floor of academic journals     100 gigabytes
50,000 trees made into paper and printed     1 terabyte ( TB )
An academic research library     2 terabytes
The print collections of the U.S. Library of Congress     10 terabytes
The National Climactic Data Center database     400 terabytes
Three years' of EOS data (2001)     1 petabyte ( PB )
All U.S. academic research libraries     2 petabytes
All hard disk capability developed in 1995     20 petabytes
All printed material in the world     200 petabytes
Total volume of information generated in 1999     2 exabytes (EB s )
All words ever spoken by human beings     5 exabytes

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