The KGB (КГБ) is the commonly used acronym for the Russian:  Комитет государственной безопасности​ (help·info) (Komitet gosudarstvennoy bezopasnosti or Committee for State Security). It was the national security agency of the Soviet Union from 1954 until 1991, and was the premier internal security, intelligence, and secret police organization during that time. While most of the KGB archives remain classified, two on-line documentary sources are available.

Since breaking away from Georgia de facto in the early 1990s with Russian help, South Ossetia established its own KGB (keeping this unreformed name). The State Security Committee of the Republic of Belarus currently uses the Russian name KGB.

A 1983 Time magazine article reported that the KGB was the world's most effective information-gathering organization. It operated legal and illegal espionage residencies in target countries where a legal resident gathered intelligence while based at the Soviet Embassy or Consulate, and, if caught, was protected from prosecution by diplomatic immunity. At best, the compromised spy either returned to the Soviet Union or was declared persona non grata and expelled by the government of the target country. The illegal resident spied, unprotected by diplomatic immunity, and worked independently of Soviet diplomatic and trade missions, (cf. the non-official cover CIA agent). In its early history, the KGB valued illegal spies more than legal spies, because illegal spies infiltrated their targets with greater ease. The KGB residency executed four types of espionage: (i) political, (ii) economic, (iii) military-strategic, and (iv) disinformation, effected with "active measures" (PR Line), counter-intelligence and security (KR Line), and scientific–technological intelligence (X Line); quotidian duties included SIGINT (RP Line) and illegal support (N Line).

Harold Adrian Russell "Kim" Philby (1 January 1912–11 May 1988) was a high-ranking member of British intelligence who worked as a double agent before defecting to the Soviet Union. He served as both an NKVD and KGB operative.

In 1963, Philby was revealed to be a member of the spy ring now known as the Cambridge Five, the other members of which were Donald Maclean, Guy Burgess, Anthony Blunt, and John Cairncross. Of the five, Philby is believed to have been most successful in providing secret information to the Soviet Union. His activities were moderated only by Joseph Stalin's fears that he was secretly on Britain's side. Philby was an Officer of the Order of the British Empire (OBE) from 1946 to 1965.

Philby was born at Ambala in the Punjab while it was a province of British India. His father, St. John Philby, a well-known author, orientalist, and convert to Islam, was a member of the Indian Civil Service and later a civil servant in Mesopotamia and advisor to King Ibn Sa'ud of Saudi Arabia.

B-boying or breaking, often called "breakdancing", is a style of street dance that originated as a part of hip-hop culture among African American and Latino youths in New York City during the early 1970s. Fast to gain popularity in the media, the dance style also gained popularity worldwide especially in South Korea, France, Russia, Japan, and Brazil. While extremely diverse in the amount of variation available in the dance, b-boying consists of four primary elements: toprock, downrock, power moves, and freezes. B-boying is typically danced to hip-hop and especially breakbeats, although modern trends allow for much wider varieties of music along certain ranges of tempo and beat patterns.

A practitioner of this dance is called a b-boy, b-girl, or breaker. Although the term "breakdance" is frequently used to refer to the dance, "b-boying" and "breaking" are the original terms. These terms are preferred by the majority of the art form’s pioneers and most notable practitioners.

The terminology used to refer to b-boying changed after promotion by the mainstream media. Although widespread, the term "breakdancing" is looked down upon by those immersed in hip-hop culture. Purists consider "breakdancing" an ignorant term invented by the media that connotes exploitation of the art and is used to sensationalize breaking. The term "breakdancing" is also problematic because it has become a diluted umbrella term that incorrectly includes popping, locking, and electric boogaloo. Popping, locking, and electric boogaloo are not styles of "breakdance". They are funk styles that were developed separately from breaking in California. The dance itself is properly called "breaking" according to rappers such as KRS-One, Talib Kweli, Mos Def, and Darryl McDaniels of Run-DMC.