The World Factbook provides basic intelligence on the history, people, government, economy, energy, geography, environment, communications, transportation, military, terrorism, and transnational issues for 266 world entities.

Provides thorough information on the major aspects of each country's government and political party system. As a convenient source for global political information, each edition features country profiles.

Full profiles provide an instant guide to history, politics and economic background of countries and territories, and background on key institutions. They also include audio and video clips from BBC archives.

The Uppsala Conflict Data Program (UCDP) is a data collection program on organized violence, based at Uppsala University in Sweden. The UCDP is a leading provider of data on organized violence and armed conflict, and it is the oldest ongoing data collection project for civil war, with a history of almost 40 years.[1] UCDP data are systematically collected and have global coverage, comparability across cases and countries, and long time series. Data are updated annually and are publicly available, free of charge.

List of participant countries from the official Eurovision Song Contest website with participation history for each country.