FreeBSD就是一种运行在Intel平台上、可以自由使用的Unix系统，它可以从Internet上免 费获得。而它又具备极其优异的性能，使它得到了计算机研究人员和网络专业人士的认可。因此，不但专业科研人员把它用作 个人使用的Unix工作站，很多企业，特别是ISP（Internet服务提供商）都使用运行FreeBSD的高档P C服务器来为他们的众多用户提供网络服务。-FreeBSD is a kind of running on Intel platform, are free to use the Unix system, which can be obtained from the Internet free of charge. And it is a very excellent performance, it was the computer network of researchers and professionals in approval. Therefore, not only professional scientific research personnel to use it as a personal use of Unix workstations, many enterprises, especially the ISP (Internet service providers) are running FreeBSD to use the high-end PC servers to provide users with many of their network services.