Answer: prolog

AnswerCrossword Clue
PROLOGIntroduction.
prologA high-level computer programming language first devised for artificial intelligence applications
prologto preface, also PROLOGUE
PROLOGLanguage akin to LISP
PROLOGIntroductory bit (Var.)
PROLOGComputer programming language
PROLOGLanguage widely used in artificial intelligence applications
PROLOGIntro material
PROLOGPreface
PROLOGIntroductory bit
PROLOGType of opening
PROLOGNovel part
PROLOGIntroduction
PROLOGLiterary intro
PROLOGOpening words
PROLOGIntro
PROLOGLanguage used in IBM's Watson