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Twitter is without a doubt the best way to share and discover what is happening right now.

Facebook is a social utility that connects people with friends and others who work, study and live around them. People use Facebook to keep up with friends, upload an unlimited number of photos, post links and videos, and learn more about the people ...

COMSOL Multiphysics is an engineering, design, and finite element analysis software environment for the modeling and simulation of any physics-based system.

A look inside the world’s most trusted news organization

The Federal Communications Commission (FCC) is an independent US government agency, directly responsible to Congress, and regulates interstate and international communications by radio, television, wire, satellite and cable. FCC website resources inc...

Online shopping from the earth's biggest selection of books, magazines, music, DVDs, videos, electronics, computers, software, apparel & accessories, shoes, jewelry, tools & hardware, housewares, furniture, sporting goods, beauty & person...

The IBM corporate home page, entry point to information about IBM products and services

Disqus is a global comment system that improves discussion on websites and connects conversations across the web.

与RFID一样，NFC信息也是通过频谱中无线频率部分的电磁感应耦合方式传递，但两者之间还是存在很大的区别。NFC技术可以说是RFID技术的一个延伸，不过RFID只能实现信息的读取以及判定，而N...