Lists of the ranks of various police agencies and forces all around the World:

Generally, all police forces of Australia follow this rank structure with some individual state police forces have ranks differing slightly.

Insignia of rank displayed on epaulette in italics and brackets

For an overview of all distinct state and federal rank structures, see Australian police ranks.

Brazil has several different police forces, each with its own ranks. At a federal level, there are the Federal Police (Policia Federal, the equivalent to the FBI), the Federal Road Police (Policia Rodoviaria Federal) and the Train Network Police (Policia Ferroviaria Federal). At a state level, there are the Military Police (Policia Militar, not to be confused to the Army police, which has a purely internal function) and the Civil Police (Policia Civil). At a city level, there are the City Guard (Guarda Municipal). In terms of staff, the Military Police and the Civil Police are the most important one, although in terms of headlines and prestige, the Federal Police is the one that concentrates most of the media attention.

Cornelius Crane "Chevy" Chase (/ˈtʃɛvi/; born October 8, 1943) is an American comedian, writer, and television and film actor. Born into a prominent New York family, Chase worked a plethora of odd jobs before moving into comedy acting with National Lampoon. He quickly became a key cast member in the inaugural season of Saturday Night Live, where his Weekend Update skit soon became a staple of the show. Chase is also well known for his portrayal of the character Clark Griswold in four National Lampoon's Vacation films, and for his roles in other successful comedies such as Caddyshack (1980), Fletch (1985), and ¡Three Amigos! (1986). He has hosted the Academy Awards twice (1987 and 1988) and briefly had his own late-night talk show, The Chevy Chase Show. Since 2009, he has appeared as Pierce Hawthorne on the NBC comedy series Community.

Chase was born in Lower Manhattan, New York City. His father, Edward Tinsley "Ned" Chase, was a prominent Manhattan book editor and magazine writer. His mother, Cathalene Parker (née Browning), a concert pianist and librettist, was the daughter of Miles Browning, who served a critical role at the Battle of Midway in World War II; she was adopted as a child by her stepfather, Cornelius Vanderbilt Crane, heir to Crane Plumbing, and took the name Cathalene Crane. As a child, Chase vacationed at Castle Hill, the Cranes' summer estate in Ipswich, Massachusetts.^{[citation needed]}

A police officer (also known as a policeman or policewoman, and constable in some forces, particularly in the United Kingdom and other Commonwealth nations) is a warranted employee of a police force. In the United States, "officer" is the formal name of the lowest police rank; in many other countries "officer" is a generic term not specifying a particular rank, and the lowest rank is often "constable". Police officers are generally charged with the apprehension of criminals and the prevention and detection of crime, and the maintenance of public order. Police officers may be sworn to an oath, and have the power to arrest people and detain them for a limited time, along with other duties and powers.

Some police officers may also be trained in special duties, such as counter-terrorism, surveillance, child protection, VIP protection, and investigation techniques into major crime, including fraud, rape, murder and drug trafficking.

Responsibilities of a police officer are varied, and may differ greatly from within one political context to another. Typical duties relate to keeping the peace, law enforcement, protection of people and property, and the investigation of crimes. Officers are expected to respond to a variety of situations that may arise while they are on duty. Rules and guidelines dictate how an officer should behave within the community, and in many contexts restrictions are placed on what the uniformed officer wears. In some countries, rules and procedures dictate that a police officer is obliged to intervene in a criminal incident, even if they are off-duty. Police officers in nearly all countries retain their lawful powers, while off duty.