Answer: prolog

AnswerCrossword Clue
PROLOG

Introductory bit

PROLOG

Language used in IBM's Watson

PROLOG

Intro

PROLOG
Opening words
PROLOG
Literary intro
PROLOGIntroduction
PROLOGNovel part
PROLOGType of opening
PROLOGIntroduction.
PROLOGPreface
PROLOGIntro material
PROLOGLanguage widely used in artificial intelligence applications
PROLOGComputer programming language
PROLOGIntroductory bit (Var.)
PROLOGLanguage akin to LISP