Qi – the sign of interoperability

Established in December 2008, the Wireless Power Consortium’s mission is to establish Qi as the global standard for powering rechargeable electronic products.

Qi is pronounced “chee” and means “vital energy.” Qi is fully compatible, so any phone or other device carrying the logo will work with any charging surface that carries the logo, regardless of manufacturer or brand. Qi charging surfaces can easily be embedded in automobiles, furniture, and countertops, making it simple to charge devices wherever you go.

More information is available at
http://www.wirelesspowerconsortium.com/

More info on why establishing a standard for wireless charging is important, and the benefits of the Qi wireless charging standard
Qi as a Technology Standard

For more information on the engineering or technology behind Qi
Technical Explanation of Qi