Big Three

Big Three is a term used colloquially to refer to the three most prominent entities in any given grouping or subject. It may refer to:

Business and education

Big Three (automobile manufacturers), describing major manufacturers in different countries
Big Three (colleges): Harvard University, Yale University, and Princeton University
Big Three (management consultancies): McKinsey, Bain & Company, and Boston Consulting Group
Big Three (credit rating agencies): S&P Global, Moody's Investors Service, and Fitch Ratings
Big Three television networks: ABC, CBS, and NBC
Big Three (law), a term used in New Zealand to refer to its three largest law firms: Bell Gully, Chapman Tripp, and Russell McVeagh

The Big 3 (folk group), a folk trio of the early 1960s composed of Cass Elliot, Tim Rose, and James Hendricks
The Big Three (English band), a Merseybeat band of the early 1960s
The Big Three, a trio of popular acts at the Palladium Ballroom: Machito, Tito Puente, and Tito Rodríguez

Grand Alliance (World War II), known as the "Big Three": the Soviet Union, the United States, and the United Kingdom, or their leaders Joseph Stalin, Franklin Roosevelt and Winston Churchill

Big Three (Belgium), the nickname for the three most successful association football clubs in Belgium
Big Three (Costa Rica), the nickname for the three most successful association football clubs in Costa Rica
Big Three (Greece), the nickname for the three most successful association football clubs in Greece
Big Three (Netherlands), the nickname for the three most successful association football clubs in the Netherlands
Big Three (Peru), the nickname for the three most successful association football clubs in Peru
Big Three (Portugal), the nickname for the three most successful association football clubs in Portugal
Big Three (Turkey), the nickname for the three most successful association football clubs in Turkey

BIG3 is a professional 3-on-3 basketball league
The trio of players for the Boston Celtics NBA franchise during the 1980s: Larry Bird, Kevin McHale, and Robert Parish
The trio of players of the Boston Celtics NBA franchise from 2007 to 2012: Ray Allen, Kevin Garnett, and Paul Pierce
Big Three (San Antonio Spurs), trio of basketball players of the San Antonio Spurs from 2003 to 2016: Tim Duncan, Manu Ginóbili, and Tony Parker
Big Three (Miami Heat), trio of basketball stars for the Miami Heat from 2010 to 2014: Chris Bosh, LeBron James and Dwyane Wade
Big Three (Cleveland Cavaliers), trio of NBA stars for the Cleveland Cavs: 2014–present: Lebron James, Kyrie Irving, and Kevin Love

The trio of players of the Melbourne Storm NRL Franchise consisting of Cameron Smith, Billy Slater, and Cooper Cronk

Rule of three (C++ programming), or The Big Three, a rule of thumb in programming