用以修饰或说明为某一具体应用问题而专门设计和编写的软件，有别于，例如，应用软件包中的程序或者只读存储器（ROM）中的程序。

Pertaining to software that has been particularly designed and written for an application(as contrasted, for example, to a program from an application package or provided on ROM).

它控制着网上用户如何共享数据和数据库，以及用户如何存取中央硬盘上的数据和应用软件的主拷备。

It controls how data and database are shared among users on the network and how users access master copies of data and application software on the centralized hard disk.

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.