Any organized assembly of resources and procedures united and regulated by interaction or interdependence to accomplish a set of specific functions. Note: Systems also include specialized systems such as industrial/process controls systems, telephone switching and private branch exchange (PBX) systems, and environmental control systems.
Source(s):
NIST SP 800-12 Rev. 1 under System from NIST SP 800-53

  a collection of computing and/or communications components and otherresources that support one or more functional objectives of an organization. IT system resources include any IT component plus associated manual procedures and physical facilities that are used in the acquisition, storage, manipulation, display, and/or movement of data or to direct or monitor operating procedures. An IT system may consist of one or more computers and their related resources of any size. The resources that comprise a system do not have to be physically connected.
Source(s):
NIST SP 800-16

  seeIT System.
Source(s):
NIST SP 800-16 under System

  See information system.
Source(s):
NIST SP 800-128 under System
NIST SP 800-137 under System
NIST SP 800-18 Rev. 1 under System
NIST SP 800-30 Rev. 1 under System
NIST SP 800-39 under System
NIST SP 800-60 Vol. 1 Rev. 1 under System
NIST SP 800-60 Vol. 2 Rev. 1 under System
NIST SP 800-37 Rev. 1 [Superseded] under System
NIST SP 800-53 Rev. 4 [Superseded] under System
NIST SP 800-53A Rev. 4 [Superseded] under System

  A discrete set of resources that are organized for the collection, processing, maintenance, use, sharing, dissemination, or disposition of information.
Source(s):
NIST SP 800-57 Part 1 Rev. 5 under System

  A combination of interacting elements organized to achieve one or more stated purposes.
Source(s):
NISTIR 7622 under System from ISO/IEC 15288:2008
NIST SP 800-161 [Superseded] under System from ISO/IEC 15288

  Combination of interacting elements organized to achieve one or more stated purposes.
Source(s):
NISTIR 8062 under System from ISO/IEC 15288

  A specific IT installation, with a particular purpose and operational environment.
Source(s):
NISTIR 5153 under System from ITSEC Ver. 1.2

  A discrete set of information resources organized for the collection, processing, maintenance, use, sharing, dissemination, or disposition of information.
Source(s):
NISTIR 7693 under System

  See Information System
Source(s):
NISTIR 8170 under System

  A discrete set of information resources organized expressly for the collection, processing, maintenance, use, sharing, dissemination, or disposition of information.
Source(s):
NISTIR 8286 under System from NIST SP 800-53 Rev. 4