Federal Contracting Acronym
DUNS
Data Universal Numbering System
Plain-English definition
DUNS was historically used as a federal entity identifier; the UEI is now the standard identifier in SAM.gov for new registrations. Registration and classification identifiers connect vendor records, solicitations, and federal spending data. Accurate codes and active registrations are prerequisites to bid and get paid.
Why it matters
Teams that understand Data Universal Numbering System (DUNS) avoid misinterpreting solicitations, contract clauses, and compliance obligations. It supports clearer bid/no-bid decisions and cleaner proposal compliance.
Where you will see it
Federal notices on SAM.gov, contract attachments, registration systems, audit requests, and internal capture/proposal documentation.
Example in context
When reviewing a solicitation, a contractor confirms how DUNS is used in the notice, whether related clauses apply, and which internal subject-matter experts should validate the response.