用来修饰说明某种应用软件，其中每一输入都会从系统或程序那里得到响应。如查询系统、飞机订票系统。一个交互系统也可以是会话式的，即用户和系统之间的连续对话。

Pertaining to an application in which each entry calls forth a response from a system or program, as in an inquiry system or an airline reservation system. An interactive system may also be conversational, implying a continuous dialog between the user and the system.