Meaning	Field	Explanations or Examples
A representative who acts on behalf of other persons or organizations	Government	e.g. The agent spied for East Germany for more than twenty years. e.g. The Attorney General plans to meet with FBI agents and civil rights investigators.
	Entertainment	e.g. Top theatrical agents are beating a path to the teenager’s door. e.g. He’s busy touting his client’s latest book around London’s literary agents.
	Business	e.g. Our agent in Rome deals with all our Italian business.
	Sports	e.g. Therefore, in the face of this urgent need regulating sports agent market, we must propose appropriate countermeasures to strengthen management.
	Law	e.g. The spouse or children of a judge may not be the law agent or defender in the cases handled by the court that judge belongs to.
	Supernatural	e.g. “Whether it’s a dead ancestor or God, whatever supernatural agent it is, if you think they’re watching you, your behavior is going to be affected,” he says.
	Linguistics	Agent (grammar), the participant of a situation that carries out the action in this situation; also the name of the thematic role (also known as the thematic relation) Agent noun (or nomen agentis), word that is derived from another word denoting an action, and that identifies an entity that does that action
A substance that exerts some force or effect.	Medical science	A chemical or a substance that produces an effect or a change or is used for a particular purpose. e.g. Alkyl indicant is a new non-ionic surface active agent.
A substance that exerts some force or effect.	Computer	Agent means a deputy program independent of an application program. Agent architecture, blueprint for software agents and intelligent control systems, depicting the arrangement of components Agent-based model, computational model for simulating the actions and interactions of autonomous individuals with a view to assessing their effects on the system as a whole Intelligent agent, autonomous entity which observes and acts upon an environment and directs its activity towards achieving goals Software agent, piece of software that acts for a user or other program in a relationship of agency User agent, the client application used with a particular network protocol
active and efficient cause	-	e.g. Agent of change