Audiobook Complete: The Dueling Machine

Title: The Dueling Machine
Author: Ben Bova
Source: Librivox

This is a long short story, or maybe novelette in length.  Its a story of good technology used for evil in ways the inventor never considered.  Reasonably interesting, but I found it fairly predictable.  It might have had more of a surprise to it when written (1963), but the intervening years have had numerous treatments of this kind of thing.