Mathematics, programming and science

• QuestionMark
  QuestionMark
  The Questionmark Corporation is a supplier of online assessment software to educational institutions, public sector employers and commercial companies worldwide. The company was started in 1988 by current chairman John Kleeman. Primary markets are Europe and North America...
  
  , a supplier of online assessment software
• Minkowski's question mark function
  Minkowski's question mark function
  In mathematics, the Minkowski question mark function, sometimes called the slippery devil's staircase and denoted by ?, is a function possessing various unusual fractal properties, defined by Hermann Minkowski in 1904...
  
  , a mathematical function
• Polygonia interrogationis
  Polygonia interrogationis
  The Question Mark is a North American nymphalid butterfly. They live in wooded areas and city parks, or generally in areas which feature trees and free spaces. The adult butterfly has a wingspan of . Its flight period is from May to September...
  
  , the Question Mark butterfly
• ?:
  ?:
  In computer programming, ?: is a ternary operator that is part of the syntax for a basic conditional expression in several programming languages...
  
  , a ternary operator
• �, Unicode replacement character
• ?, a distortion of the astronomical symbol for the dwarf planet Ceres

People

• Seung-Hui Cho
  Seung-Hui Cho
  Seung-Hui Cho was a senior-level undergraduate student at Virginia Polytechnic Institute and State University who killed 32 people and wounded 17 others on April 16, 2007, in the shooting rampage which came to be known as the "Virginia Tech massacre." Cho later committed suicide after law...
  
   or "Question Mark", Virginia Tech massacre shooter
• Matthew Lesko
  Matthew Lesko
  Matthew Lesko is an American author, self-proclaimed federal grant researcher, and infomercial personality. He has authored over 20 reference books telling people how to get "free" money from the United States government...
  
   or "question mark guy", American author and infomercial host

Popular culture

• ? (film)
  ? (film)
  ? is a 2011 Indonesian film directed by Hanung Bramantyo. It stars Revalina Sayuthi Temat, Reza Rahadian, Agus Kuncoro, Endhita, Rio Dewanto, and Hengky Sulaeman. The plot revolves around the interactions of three families, one Buddhist, one Muslim, and one Catholic...
  
  , a 2011 Indonesian film
• "?" (Lost)
  ? (Lost)
  "?", typically pronounced "Question Mark" is the 46th episode of Lost and the 21st episode of the second season. The episode was directed by Deran Sarafian, and written by Damon Lindelof and Carlton Cuse. It first aired on May 10, 2006 on ABC. The character of Mr. Eko is featured in the episode's...
  
  , an episode of Lost
• Question Mark & the Mysterians, an American band
• ? (Bersuit album)
  ? (Bersuit album)
  ? is the ninth album by the Argentine rock band Bersuit Vergarabat. It was recorded from July to October 2007, and was released on 18 December 2007 by Pussyfoot Records.-Track listing:- Personnel :*Gustavo E. Cordera – lead vocals...
  
  , 2007
• ? (Enuff Z'nuff album)
  ? (Enuff Z'nuff album)
  Enuff Z'nuff's 11th studio album, simply titled ?, is an odds and ends collection of previously unreleased studio material recorded throughout the band's career. Although a few new tracks were recorded specifically for the album, the remainder of the songs were originally recorded during the...
  
  , 2004
• ? (Neal Morse album), 2005
• ? (Nena album)
  ? (Nena album)
  ? is the second album by German pop-rock band Nena. It was released in 1984 just a few months before the band's first international album99 Luftballons, which contains songs from their previously album Nena and this album, re-recorded with English lyrics.-Track listing:-Singles:*"? "/ B Side:...
  
  , or the title song, 1984
• ? (EP), an EP by Modwheelmood, 2003
• "? (Modern Industry)", a song by Fishbone from Fishbone
  Fishbone (EP)
  Fishbone is the recording debut of alternative group Fishbone. This six-song EP was released in 1985 and captures the band at the height of their early funk/ska era. The track Party at Ground Zero remains one of the band's most popular tracks...
  
  

Other uses

• Question Mark (aircraft)
  Question Mark (aircraft)
  The Question Mark was a modified Atlantic-Fokker C-2A airplane flown by aviators of the United States Army Air Corps to experiment with aerial refueling in 1929. It was used to establish new world records in aviation for sustained flight , refueled flight, sustained flight , and distance...
  
   a U.S. Army aircraft that set an endurance record in 1929
• ? (bistro)
  ? (bistro)
  ? is the oldest traditional tavern situated in Belgrade, Serbia. Located at 6 Kralja Petra Street, the building is nearly 200 years old. The cuisine served is traditional, and specific starogradska music is played...
  
  , a restaurant in Belgrade, Serbia
• ?, a symbol used in chess punctuation
  Punctuation (chess)
  When annotating chess games, commentators frequently use question marks and exclamation points to denote a move as bad or good. The symbols normally used are "??", "?", "?!", "!?", "!", and "!!". The corresponding symbol is juxtaposed in the text immediately after the move When annotating chess...
  
  
• ?, an approximation of the IPA symbol for the glottal stop
  Glottal stop
  The glottal stop, or more fully, the voiceless glottal plosive, is a type of consonantal sound used in many spoken languages. In English, the feature is represented, for example, by the hyphen in uh-oh! and by the apostrophe or [[ʻokina]] in Hawaii among those using a preservative pronunciation of...
  
  

See also

• ?? (disambiguation)
  ?? (disambiguation)
  "九龍" most often refers to Kowloon, an urban area in Hong Kong made up of the Kowloon Peninsula and New Kowloon."九龍" or "九龙" may also refer to:Other Locations:*Cloudy Hill , a mountain in Hong Kong's New Territory...
  
  
• Inverted question and exclamation marks (¿)
• Question (disambiguation)
  Question (disambiguation)
  A question may be either a linguistic expression used to make a request for information, or the request itself.Question, The Question or A Question may also refer to:- Literature :...