Definition
A DoD 8140, also called DoD Directive 8140 or 8140, is a credentialing concept you will see in blueprints, job posts, and architecture discussions. Understanding it helps you answer scenario questions and explain tradeoffs when designing or defending systems. You will meet DoD 8140 on vendor certification exams across Accumentum catalogs, and in Accumentum courses that reinforce the idea with labs and practice.