By Outrider Editorial Team · Updated August 20, 2026
PSC D318 covered integrated hardware, software, and services solutions where services made up the predominant share of contract value. It is a legacy code: the October 2020 restructure end-dated the D3xx series and replaced it with the DA through DK towers. D318 nonetheless recorded $1.09 billion in FY2025, entirely from activity against awards written before the change.
The concept the restructure deliberately removed
D318 existed to describe a bundle. The tower model was designed to stop that, by forcing the buying office to name the dominant function, applications or compute or network or end user, even when the deliverable is integrated. There is no modern equivalent to D318, which is the point: a bundled solution today must pick a tower or be split across several.
Where the dollars land
Computer Systems Design Services (541512) took $519 million, and second place is unusual: 517919, All Other Telecommunications, at $400 million, roughly 37 percent of the code from a single registration. Other Computer Related Services (541519) follows at $43 million, engineering services 541330 at $34 million, and 517110 at $32 million.
PSC and NAICS in one sentence
The PSC labels the purchase and the NAICS code labels the seller's industry, and only the first was rewritten in 2020.
Do not build searches on D318. Use the tower codes and accept that one bundled requirement may now surface under two or three of them.
NAICS crosswalk
Where FY2025 D318 dollars landed, by the winning vendor's registered NAICS code.
- 541512Computer Systems Design Services$518.9M
- 517919All Other Telecommunications$400.0M
- 541519Other Computer Related Services$42.8M
- 541330Engineering Services$34.4M
- 517110Wired Telecommunications Carriers$31.6M
FY2025 federal contract obligations, USAspending.gov
Frequently Asked
PSC D318 questions, answered.
What does PSC D318 cover?
Integrated hardware, software, and services solutions in which services were the predominant portion of contract value. The code was end-dated in the October 2020 IT PSC restructure.
What NAICS codes win D318 work?
Computer Systems Design Services (541512) at $519 million and All Other Telecommunications (517919) at $400 million together take roughly 84 percent of the FY2025 total.
What is the modern equivalent of D318?
There isn't one. The tower codes require the buying office to classify by dominant function, not by bundle, so integrated requirements now appear under DA, DB, DC, DD, DE, DF, DG, DH, DJ, or DK.
Should I still search for D318?
Only for historical analysis of incumbents and recompete timing. No new solicitation should carry it, and its FY2025 dollars are activity against pre-2020 awards.
Watch D318 opportunities
Solicitations are filed by PSC as well as NAICS. Outrider matches your company profile against both so nothing filed under a code you do not watch slips past.
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