Games

• Chess opening
  Chess opening
  A chess opening is the group of initial moves of a chess game. Recognized sequences of opening moves are referred to as openings as initiated by White or defenses, as created in reply by Black. There are many dozens of different openings, and hundreds of named variants. The Oxford Companion to...
  
  
• Backgammon opening theory
  Backgammon opening theory
  The first moves of a backgammon game are the opening moves, collectively referred to as the opening, and studied in the backgammon opening theory. Backgammon opening theory is not developed in as much detail as opening theory in chess, which has been widely studied...
  
  
• Opening bid, a term from contract bridge

Other

• Grand opening
  Grand opening
  Grand opening is a term used when a business, public office, or private association wishes to announce the official opening of a new location. This differs from just opening the doors on the first day, in that a grand opening is more of a celebration event, not just the first day having the doors...
  
   of a business or other institution
• Al-Fatiha
  Al-Fatiha
  Sura Al-Fatiha , is the first chapter of the Qur'an. Its seven verses are a prayer for Allah's guidance, and stress His Lordship and Mercy...
  
  , "The Opening", first chapter of the Qur'an
• Opening
  Opening (morphology)
  In mathematical morphology, opening is the dilation of the erosion of a set A by a structuring element B:A\circ B = \oplus B, \, where \ominus and \oplus denote erosion and dilation, respectively....
  
  , a morphological filtering operation used in image processing
• Opening credits
  Opening credits
  In a motion picture, television program, or video game, the opening credits are shown at the very beginning and list the most important members of the production. They are now usually shown as text superimposed on a blank screen or static pictures, or sometimes on top of action in the show. There...
  
   or title sequence
  Title sequence
  A Title Sequence is the method by which cinematic films or television programs present their title, key production and cast members, or both, utilizing conceptual visuals and sound...
  
   of a TV show or film
• Opening statement
  Opening statement
  An opening statement is generally the first occasion that the trier of fact has to hear from a lawyer in a trial, aside possibly from questioning during voir dire. The opening statement is generally constructed to serve as a "road map" for the fact-finder...
  
  , a beginning statement in a court case
• Saluting
  Salutation (greeting)
  A salutation is a greeting used in a letter or other written communication, such as an email. Salutations can be formal or informal. The most common form of salutation in a letter is Dear followed by the recipient's given name or title...
  
  , opening a correspondence
• Vernissage
  Vernissage
  A vernissage is a term used for a preview of an art exhibition, often private, before the formal opening. Guests may be served canapés and wine as they discuss with artists and others the works in the exhibition...
  
  , the opening of an art exhibition