Security Association
Service Agent
Situational Awareness
Source Address
System Administrator
System and Services Acquisition
System and Services Acquisition (NIST SP 800-53 security control family)
Systems and Services Acquisition

  A person who manages a computer system, including its operating system and applications. A system administrator’s responsibilities are similar to that of a network administrator.
Source(s):
NIST SP 800-44 Version 2 under System Administrator

  A person who manages a computer system, including its operating system and applications. Responsibilities are similar to that of a network administrator.
Source(s):
NIST SP 800-45 Version 2 under System Administrator

  Set of values that define the features and protections applied to a connection.
Source(s):
NIST SP 800-77 under Security Association [Superseded]

  Individual or group responsible for overseeing the day-to-day operability of a computer system or network. This position normally carries special privileges including access to the protection state and software of a system.
Source(s):
NISTIR 4734 under System Administrator
NISTIR 7316 under System Administrator