Shane Harris at the Washingtonian read through the book's account of these sweeping and controversial surveillance programs, conducted under the code name "Ragtime":
Ragtime, which appears in official reports by the abbreviation RT, consists of four parts.
Ragtime-A involves US-based interception of all foreign-to-foreign counterterrorism-related data; Ragtime-B deals with data from foreign governments that transits through the US; Ragtime-C deals with counterproliferation actvities; and then there's Ragtime-P, which will probably be of greatest interest to those who continue to demand more information from the NSA about what it does in the United States.
P stands for Patriot Act. Ragtime-P is the remnant of the original President’s Surveillance Program, the name given to so-called "warrantless wiretapping" activities after 9/11, in which one end of a phone call or an e-mail terminated inside the United States. That collection has since been brought under law, but civil liberties groups, journalists, and legal scholars continue to seek more information about what it entailed, who was targeted, and what authorities exist today for domestic intelligence-gathering.