https://www.authorea.com/doi/full/10.22541/au.163699841.19031727

## Abstract

> [DARPA](/pages/Defense%20Advanced%20Research%20Projects%20Agency.txt) formulated the [Explainable AI](/pages/Explainable%20AI.txt) (XAI) program in <2015> with the goal to enable end users to better understand, trust, and effectively manage artificially intelligent systems. In <2017>, the four-year XAI research program began. Now, as XAI comes to an end in <2021>, it is time to reflect on what succeeded, what failed, and what was learned. This article summarizes the goals, organization, and research progress of the XAI Program.