An excerpt from the NSA's Wikipedia
This excerpt is from an article in the NSA's "Intellipedia," a classified system built with the same open-source software used by Wikipedia. Like the other documents, it describes the problem of high-volume, low-value data collection — and the NSA's response — with a focus on Internet contact lists. NSA collects millions of e-mail address books globally
GRAPHIC: Barton Gellman and Matt DeLong - The Washington Post.