Immune-Based Computing:

Uses “antigens” to discriminate between “self” and “nonself,” and to affect selfrepair within a system.

Intelligence:

Difficult to define exactly, but incorporates awareness of (and ability to interact with and adapt to) ones environment, as well as an ability to learn from experience (thereby increasing our knowledge).

Intelligent System:

Used in this article primarily to mean (a) biologically-inspired “soft computing” techniques which can be incorporated into an information system (IS) in order to improve performance, and secondarily (b) in the sense of intelligence gathering, in order to render an IS more secure.

Soft Computing:

An older term for Computational Intelligence (see above).

Swarm Intelligence (SI):

Refers to a class of algorithms inspired by the collective behaviour of insect swarms, ant colonies, the flocking behaviour of some bird species, or the herding behaviour of some mammals, such that the behaviour of the whole can be considered as exhibiting a rudimentary form of “intelligence.