O - P

OIRA – Office of Information and Regulatory Affairs

OMB – The Office of Management and Budget

OSC – Organization Seeking Certification

OSD – Office of the Secretary of Defense

OSD A&S – OSD for Acquisition and Sustainment

OSD I&S – OSD for Intelligence and Security

OSD R&E – OSD for Research and Engineering

pDNS – NSA Protective Domain Name System Service

POAM – Plan of Action and Milestones

PPD – Presidential Policy Directive

• PPD 21 – Critical Infrastructure Security and Resilience

PTAC – Procurement Technical Assistance Center

PRA – Paperwork Reduction Act