NDIA provides its members and customers broad outreach and sector coverage through its chapters, technical, policy, and war-fighting divisions, and the complimentary missions of its affiliate subsidiaries of: The National Training and Simulation Association (NTSA) - training and simulation systems; Association for Enterprise Integration (AFEI) - network centric operations and transformational business integration; Precision Strike Association (PSA) - precision engagement weapon systems; and and Women In Defense (WID) - workforce professional development.