Agent

Look up agent in Wiktionary, the free dictionary.

Agent may refer to:

In law

Agent (economics), an actor and decision maker in a model
- Homo economicus, a model, in some economic theories, of humans as rational and self-interested
- Principal–agent problem, occurs when one person or entity makes decisions that impact another person or entity
- Rational agent, an entity with clear preferences, which always chooses the action that results in the optimal outcome for itself
- Representative agent, a typical decision maker
Agent-based computational economics, computational study of economic processes modeled as dynamic systems of interacting agents

Biological agent, an infectious disease or toxin used in bioterrorism or biological warfare
Pharmacological agent, a chemical with pharmacological or biological activity
Chemical warfare, use of the toxic properties of chemical substances as weapons
- Blister agent or vesicant, a chemical compound that causes skin, eye and mucosal irritation
- Blood agent or cyanogen agent, a chemical compound carried by the blood
- Incapacitating agent, produces physiological or psychological effects
- Nerve agent or nerve gases, a class of chemicals that disrupt nerve impulses to organs
- Pulmonary agent or choking agent, a chemical agent that impedes breathing
- Riot control agent, a lachrymatory (tear-forming) agent

Agent architecture, a blueprint for software agents and control systems
Agent-based model, a computational model for simulating the actions and interactions of individuals
Intelligent agent, an autonomous, goal-directed entity which observes and acts upon an environment
Software agent, a piece of software that acts for a user or other program
- Forté Agent, an email and Usenet news client
- User agent, a client application for a particular network protocol

Agent (grammar), participant that carries out the action in a situation, or a thematic role or relation
Agent noun (or nomen agentis), a word identifying an actor, derived from a word denoting an action