UDP点对点聊天的实用程序，基于VC，对于学习网络编程比较有帮助。-UDP peer-to-peer chat utility, based on VC, the Learning Network Programming for more help.

一个简单实用的局域网网络聊天ficq源码，高手可以略过。 -A simple LAN network chat utility ficq source, you can skip.

Smith Chart: The Smith chart, invented by Phillip H. Smith (1905-1987),is a graphical aid or nomogram designed for electrical and electronics engineers specializing in radio frequency (RF) engineering to assist in solving problems with transmission