清单3提供了一个简单的样例脚本，它可以接收3个事件：startup，启动作业；shutdown和runlevel - 3，停止作业。
Listing 3 provides a simple example script that accepts three events: startup, which causes the job to start, or shutdown and runlevel-3, which cause the job to stop.
苹果公司的Mac平台，在很多年之前就拥有了自己的AppleScript技术，最近又添加了Automator，使用户可以在脚本代码中自定义实现特定功能的actions动作，让程序在某些事件发生时自动处理那些令人厌烦的重复性作业任务。
The Mac has had AppleScript for many years, and recently added Automator so users could define actions that are performed at certain events to automate boring, repetitive tasks.
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