What is Planner written in?

Year 1969 Paradigm logic, procedural Typing dynamic

Its runtime is implemented in Lisp (documented).

Relationship Graph

All directly connected languages. Click any node to navigate to its page.

Language	Confidence	Notes	Source
Lisp	90%	Planner was implemented as a Lisp system at MIT	Source

Prolog — Planner (Carl Hewitt, 1969) directly inspired Prolog's logic programming paradigm; listed as influence on Wikipedia

What language is Planner written in?

Planner is primarily implemented in Lisp. See the implementation section above for details and source references.

Which languages did Planner influence?

Planner influenced Prolog among others.