### Question
What is the definition of subsystem?


### Answer
The definition of **subsystem** is as follows in *10 U.S.C. § 2533b*:

> a functional grouping of items that combine to perform a major function within an end item, such as electrical power, attitude control, and propulsion

#### Citation:
  - *10 U.S.C. § 2533b*
  - Heading: **Subtitle A-General Military Law > PART IV-SERVICE, SUPPLY, AND PROCUREMENT > CHAPTER 148-NATIONAL DEFENSE TECHNOLOGY AND INDUSTRIAL BASE, DEFENSE REINVESTMENT, AND DEFENSE CONVERSION > SUBCHAPTER V-MISCELLANEOUS TECHNOLOGY BASE POLICIES AND PROGRAMS**

