48 CFR § 39.002 - 39.002 Definitions.

---
identifier: "/us/cfr/t48/s39.002"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "48 CFR § 39.002 - 39.002   Definitions."
title_number: 48
title_name: "Federal Acquisition Regulations System"
section_number: "39.002"
section_name: "39.002   Definitions."
chapter_number: 1
chapter_name: "FEDERAL ACQUISITION REGULATION"
subchapter_number: "F"
subchapter_name: "SPECIAL CATEGORIES OF CONTRACTING"
part_number: "39"
part_name: "ACQUISITION OF INFORMATION TECHNOLOGY"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "40 U.S.C. 121(c); 10 U.S.C. chapter 4 and 10 U.S.C. chapter 137 legacy provisions (see 10 U.S.C. 3016); and 51 U.S.C. 20113."
regulatory_source: "61 FR 41470, Aug. 8, 1996, unless otherwise noted."
cfr_part: "39"
---


# 39.002 39.002   Definitions.

As used in this part—

*Modular contracting* means use of one or more contracts to acquire information technology systems in successive, interoperable increments.

*National security system* means any telecommunications or information system operated by the United States Government, the function, operation, or use of which—

(1) Involves intelligence activities;

(2) Involves cryptologic activities related to national security;

(3) Involves command and control of military forces;

(4) Involves equipment that is an integral part of a weapon or weapons system; or

(5) Is critical to the direct fulfillment of military or intelligence missions. This does not include a system that is to be used for routine administrative and business applications, such as payroll, finance, logistics, and personnel management applications.

[61 FR 41470, Aug. 8, 1996, as amended at 62 FR 274, Jan. 2, 1997; 62 FR 44830, Aug. 22, 1997; 63 FR 9068, Feb. 23, 1998; 66 FR 2133, Jan. 10, 2001; 79 FR 70344, Nov. 25, 2014]