title: Absys
text: # Absys
  
  Absys was an early declarative programming language from the University of Aberdeen. It anticipated a number of features of Prolog such as negation as failure, aggregation operators, the central role of backtracking and constraint solving. Absys was the first implementation of a logic programming language.
  
  The name Absys was chosen as an abbreviation for Aberdeen System.
  
  