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Pew Research Center: The Databank
Data from the various Pew Centers on topics such as news, public opinion, and the Internet
Yearbook of statistics: telecommunication services [print]
International Telecommunication Union
Little Data Book on Information and Communication Technology (2009)
Economic and social indicators for 209 countries, from the World Bank
Telecommunication/ICT statistics (basic indicators, fixed telephone lines, mobile subscribers and Internet indicators) from the International Telecommunications Union
World Internet Project
Although we don't have access to the full WiP report, many of the reports from the individual countries involved are available for free online. Great source for international data on Internet usage.
How much information?
From Hal A Varian & Peter Lyman at U of C Berkeley:"This study is an attempt to measure how much information is produced in the world each year"
General statistics sources with Communications content
World Development Indicators
Provides access to over 600 development indicators including economic, social, environmental, business, and technology for more than 208 countries. Includes literacy rates, media ownership and use, etc.
UNdata (Formerly known as UNSTATS)
"A compilation of United Nations and agency statistics, covering economic, social, financial and development topics." Also see Economic Statistics and Demographic & Social Statistics at the UN site.
SourceOECD: Statistics on OECD countries (and selected non-OECD countries) covering themes such as Agriculture & Fisheries, Economic Projections, Environment, and Health.
Public opinion data
Ipsos News Centre
International (but largely US/Canada) polls, public opinion and research information on topics including politics, technology, health, finance, consumer products and consumer trends.
World Public Opinion (WPO)
"A consortium of more than 25 research centers studying public opinion on international issues in their respective countries"