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Articles & Guides

Procurement references

Industries (NAICS)

Product & service codes

Federal Acquisition Regulation

Small business size standards

Your research

Public records.
A clearer picture.

Product & service codes

Product & service codes

Support- Professional: Expert Witness

PSC R424

Official source

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Source date: Apr 8, 2025

Record identifier

R424

Independent research for federal contractors.
Not affiliated with the U.S. government.

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