Parallel Evaluation of Interaction Nets with MPINE. We describe the MPINE tool, a multi-threaded evaluator for Interaction Nets. The evaluator is an implementation of the present author’s Abstract Machine for Interaction Nets [5] and uses POSIX threads to achieve concurrent execution. When running on a multi-processor machine (say an SMP architecture), parallel execution is achieved effortlessly, allowing for desktop parallelism on commonly available machines.