消息中间件为分布式系统中创建、发送、接收消息提供了一套可靠、通用的方法，它屏蔽了不同操作系统和网络协议的具体细节，减少了开发跨平台和网络协议软件的复杂性。

Message-oriented middleware provides a common way to create, send and receive message in distributed systems, it reduces the complexity in developing the cross platform and network protocol software.

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本文叙述一个支持分布式办公信息系统的网络操作系统的设计原则、实现方案和使用方法。

The design idea and implementation of a network operating system (NOP) are described, which is a supporting system for DOIS.

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因此，网络与分布式系统之间的区别在于软件(特别是操作系统)，而不是硬件。

Thus, the distinction between a network and a distributed system lies with the software (especially the operating system), rather than with the hardware.

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