The other code on every federal contract.

PSC R425 carried $33.2B in FY2025 federal obligations, making it one of the largest services codes in government. See which NAICS codes win R425 work and who buys it.

PSC R499 moved $27.0 billion in FY2025 obligations as the catch-all of the R4 professional support series. See the NAICS codes behind the money.

PSC R408 covers federal program management support and drew $9.0 billion in FY2025 obligations. See its top NAICS codes and the two codes it excludes.

PSC R706 carried $6.5 billion in FY2025 federal logistics support obligations. The top NAICS is not the logistics consulting code, and that matters for search.

PSC R699 took $3.4 billion in FY2025 as the residual code of the R6 administrative series. Its NAICS mix is the flattest of any billion-dollar service code.

PSC R799 absorbed $3.0 billion in FY2025 as the residual of the R7 management series, which has named codes for coin minting but not for general program management.

PSC R710 covers federal financial support services including credit card services, with $2.3 billion obligated in FY2025. One NAICS code takes 61 percent of it.

PSC R701 carried $1.49 billion in FY2025 federal advertising obligations. Advertising agencies take the majority, but the third-largest NAICS is engineering services.

PSC R707 covers federal acquisition support and obligated $1.16 billion in FY2025. Its top NAICS is a research code, not a consulting code.

PSC R704 covers federal audit services with $1.12 billion obligated in FY2025. It has the cleanest PSC-to-NAICS mapping of any large services code.

PSC R430 covers federal guard and badging services with $1.01 billion obligated in FY2025. Guard services take 87 percent of the code.

PSC R702 covers federal data collection services with $979 million obligated in FY2025. The manual excludes surveys and public opinion research from it.

PSC R410 covers federal program evaluation and review with $844 million obligated in FY2025. It is defined mainly by what it excludes.

PSC R604 covers federal mailing and distribution services with $728 million obligated in FY2025. Pharmaceutical manufacturing is its third-largest NAICS.

PSC DA01 is the largest federal IT services code, with $22.6 billion obligated in FY2025 for application development and support labor.

PSC DA10 covers federal business application SaaS and subscriptions, with $8.6 billion obligated in FY2025. Resellers, not publishers, take the largest share.

PSC DF01 covers federal enterprise architecture, IT financial management, and IT strategy support, with $4.6 billion obligated in FY2025.

PSC DG01 covers federal network support labor, including cell towers and outside plant cabling, with $3.0 billion obligated in FY2025.

PSC DG11 is the federal telecom access and usage billing code, with $2.4 billion obligated in FY2025 across satellite, cellular, internet, and landline service.

PSC DD01 covers federal ITSM, operations center, and IT project management labor with $2.0 billion obligated in FY2025. Tier 1 and 2 help desk is excluded.

PSC D399 is a legacy IT code retired in the 2020 restructure that still moved $1.84 billion in FY2025 obligations. Here is what replaced it.

PSC DE01 covers federal help desk and end-user support labor with $1.73 billion obligated in FY2025. Mobile device support is excluded and has its own code.

PSC DJ01 covers federal cybersecurity and compliance support labor with $1.61 billion obligated in FY2025. Implementing security controls is explicitly excluded.

PSC DG10 covers federal network delivered as a managed service or subscription, with $1.34 billion obligated in FY2025 including SDN and cloud network management.

PSC DF10 covers federal IT management tools and services bought by subscription, with $1.15 billion obligated in FY2025 for EA, IT financial management, and strategy.

PSC D318 is a retired legacy IT code for bundled solutions that still carried $1.09 billion in FY2025 obligations.

PSC DB10 covers federal compute delivered as a cloud service, with $962 million obligated in FY2025. It is the one code where the cloud infrastructure NAICS ranks first.

PSC DC10 covers federal colocation and data center as a service, with $954 million obligated in FY2025. Systems integrators win more of it than colocation operators.

PSC D304 is a retired telecom services code that still moved $932 million in FY2025, most of it under an equally retired NAICS code.

PSC DE10 covers federal desktop as a service and end-user SaaS, with $799 million obligated in FY2025. It is the only code led by computer facilities management.

PSC DC01 covers federal data center support labor including smart hands and MDF closets, with $798 million obligated in FY2025.

PSC AC13 is the largest federal R&D code, with $9.2 billion obligated in FY2025 for DoD experimental development. Low-rate initial production is excluded.

PSC AC32 carried $7.3 billion in FY2025 applied research obligations, making it the second-largest R&D code despite covering a narrow budget subfunction.

PSC AC12 covers DoD applied research with $3.8 billion obligated in FY2025. It maps roughly to the 6.2 budget activity.

PSC AZ11 is a retired catch-all R&D code that still moved $3.7 billion in FY2025, almost entirely under a NAICS code retired in 2012.

PSC AC33 covers defense-related experimental development with $3.0 billion obligated in FY2025, led by aircraft manufacturing rather than by a research NAICS.

PSC AC24 covers atomic energy defense R&D overhead with $2.9 billion obligated in FY2025. Its top NAICS is missile and space vehicle manufacturing.

PSC AR11 covers space basic research with $2.2 billion obligated in FY2025, but its top two NAICS codes are spacecraft and propulsion manufacturing.

PSC AR12 covers space applied research with $2.2 billion obligated in FY2025, over 90 percent of it under a single research NAICS code.

PSC AC11 covers DoD basic research with $1.85 billion obligated in FY2025. Aircraft engine manufacturing is its second-largest NAICS code.

PSC AC22 covers atomic energy defense applied research with $1.72 billion obligated in FY2025, 97 percent of it under a single NAICS code.

PSC AR22 is a retired space R&D code that still moved $1.62 billion in FY2025, 98 percent of it under one research NAICS code.

PSC AR15 covers space R&D facilities and major equipment with $1.43 billion obligated in FY2025. Industrial building construction is its third-largest NAICS.

PSC AC23 covers atomic energy defense experimental development with $1.40 billion obligated in FY2025. Ammunition manufacturing is its second-largest NAICS.

PSC AC15 covers DoD R&D facilities and major equipment with $1.39 billion obligated in FY2025, including test stands and instrumented ranges.

PSC AN12 covers applied research under the health care services subfunction, with $1.39 billion obligated in FY2025. It is not the NIH research code.

PSC AJ12 covers federal general science applied research with $1.38 billion obligated in FY2025, the largest civilian science R&D code in this set.

PSC AC14 covers DoD R&D administrative and facility operating expenses, with $977 million obligated in FY2025. Engineering services is its largest NAICS.

PSC AC31 covers basic research under the defense-related activities subfunction, with $975 million obligated in FY2025. Two-thirds sits under a retired NAICS code.

PSC AC61 is a retired R&D code that still moved $850 million in FY2025, essentially all of it under an equally retired NAICS code.

PSC AJ11 covers federal general science basic research with $839 million obligated in FY2025, including social science research contracts.

PSC AR24 is a retired space R&D code with $772 million obligated in FY2025 across just two NAICS codes, the narrowest profile in this reference set.

PSC 7A21 covers perpetually licensed federal business application software, with $7.2 billion obligated in FY2025. It is a product code with nothing physical in it.

PSC 7E20 covers federal laptops, monitors, printers, VTC gear, and perpetual productivity software, with $2.2 billion obligated in FY2025.

PSC 7A20 covers perpetually licensed federal developer tooling, with $1.37 billion obligated in FY2025. Its sibling 7A21 is more than five times larger.

PSC 7B22 covers federal server hardware and perpetually licensed server software, with $1.27 billion obligated in FY2025. Operating systems ride the hardware code.

PSC 7G21 covers federal digital network hardware including cellular infrastructure, with $909 million obligated in FY2025. Half of it goes to resellers.

PSC 7G20 covers legacy analog voice equipment with $843 million obligated in FY2025, yet two-thirds went to wireless communications equipment manufacturers.

PSC 7G22 covers federal satellite and RF communications equipment with $823 million obligated in FY2025, including handheld two-way radio.

PSC 7C20 covers hardware and perpetual software for tiered federal data centers, with $747 million obligated in FY2025. A second code covers closets and racks.