Big O

Big O or The Big O may refer to:

In fiction

• The Big O, a Japanese animated series
  • Big O (mecha), the premier mecha of The Big O
• The Missing Piece Meets the Big O, a children's book by Shel Silverstein
• The Brotherhood of International Government and Order, the evil organisation from the Matt Helm films

In mathematics and computing

• Big Omega function (disambiguation), various arithmetic functions in number theory
• Big O notation, asymptotic behavior in mathematics and computing
  • Time complexity in computer science, whose functions are commonly expressed in big O notation

People

• Omar Gooding (born 1976), American actor, rapper, voice artist and comedian
• Oliver Miller (born 1970), former professional basketball player
• Barack Obama (born 1961), 44th President of the United States
• Brian Oldfield (born 1945), former world record shot putter
• Roy Orbison (1936–1988), American singer-songwriter
• Glenn Ordway (born 1951), Boston-area sports radio host
• Bob Orton (1929–2006), professional wrestler
• Otis Redding (1941–1967), American soul singer-songwriter and record producer
• Oscar Robertson (born 1938), former professional basketball player
• Oscar Santana, American radio personality
• Oprah Winfrey (born 1954), American television host, producer and philanthropist

Other uses

• The Greek letter Ω, or Omega, whose name translates literally as "big O" or "great O"
• Big O (Ferris wheel), the world's largest centerless Ferris wheel, located in Japan
• Big Omega function (disambiguation), various arithmetic functions in number theory
• Big O notation, asymptotic behavior in mathematics and computing
  • Time complexity in computer science, whose functions are commonly expressed in big O notation
• Big O Tires, a tire retailer in the United States and Canada
• Ohio, in slang
• Olympic Stadium (Montreal), the main venue of the 1976 Summer Olympics
• Orgasm, in slang
• Overstock.com, with marketing tag-line "The Big Big O"
• The Big O (album), by Roy Orbison
• Big "O", a structure on Skinner Butte in Eugene, Oregon, United States, listed on the National Register of Historic Places
• Lake Okeechobee, the largest lake in Florida
• The Big Orange Chorus, a barbershop men's chorus in Jacksonville, Florida