Question-answering language. A procedural calculus for intuitive reasoning. A LISP-based pattern-matching language for theorem proving. "QA4, A Language for Writing Problem-Solving Programs", J.F. Rulifson et al, Proc IFIP Congress 1968.
QA4
Meaning of QA4 in English
FOLDOC computer English dictionary. Английский словарь по компьютерам FOLDOC. 2012