"The 2010 CIA World Factbook" by United States Central Intelligence Agency is a reference resource published in 2010. This almanac provides comprehensive summaries of 258 international entities worldwide, covering demographics, geography, government, economy, and military information. Originally designed for U.S. government officials, it has become widely used for academic research and journalism. Updated from classified origins in 1962, this public domain work draws from numerous governmental sources to create standardized country profiles, though its coverage reflects American political perspectives and territorial interpretations.