title: Half-open
text: # Half-open
  
  Half-open may refer to:
  
  * Half-open file in chess
  * Half-open vowel, a class of vowel sound
  
  ## Computing and mathematics
  
  * Half-open interval, an interval containing only one of its endpoints
  * Half-open line segment, a line segment containing only one of its endpoints
  * TCP half-open, a TCP connection out of synchronization
  