Other instances in which this pattern is useful include logging and printing, such as when you want only one instance of a class to access and control one particular printer at a time.

在其他实例中，此模式也是有用的，包括登录和打印，例如，当您想要一个能够每次访问并控制一个特别打印机的类实例。

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Singletons are a useful way to control access to a class, making sure that only one instance can exist.

单例模式是一种有用的控制类访问的途径，他能保证只有一个类实例存在。

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For example, for a queue, an MQQUEUE profile is used to control MQI access to the queue, but other profiles in the MQADMIN class are used to control context and alternate user security.

例如，对于队列，使用一个MQQUEUE概要文件来控制对该队列的访问，但是mqadmin类中的其他概要文件用于控制上下文和用户安全性。

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Additionally, the Dell Wireless Dock has the same level of usability and easy integration as the current Latitude E Series Docking Stations with remote access, monitoring and configuration for business class control.

ENGADGET: Dell ships its WiGig-based Wireless Dock, gives your Latitude a home base for $249 (video)