Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Wi-Fi Alliance (WFA) is a trade group that owns the trademark Wi-Fi.From Wi-Fi Alliance publications: The Wi-Fi Alliance is a global, non-profit industry association of more than 300 member companies devoted to promoting the growth of wireless Local Area Networks (WLANs). With the aim of enhancing the user experience for wireless portable, mobile, and home entertainment devices, the Wi-Fi Alliance''s testing and certification programs help ensure the interoperability of WLAN products based on the IEEE 802.11 specification. Since the introduction of the Wi-Fi Alliance''s certification program in March 2000, more than 4,000 products have been designated as Wi-Fi certified, encouraging the expanded use of Wi-Fi products and services across the consumer and enterprise markets.