The development and proliferation of personal computers using the CP/M operating system in the late 1970s, and later DOS-based systems starting in 1981, meant that many sites grew to dozens or even hundreds of computers.
随着二十世纪70年代晚期CP/M操作系统带来的个人计算机的发展和扩散，再到1981年开始普及的DOS系统，许多节点扩展出几十个甚至数以百计的计算机。