802.11a 5 GHz, OFDM, 54 Mbps (most radios do 4.9GHz through 6.1GHz)
802.11e Polling, QoS, Hidden node support
802.11g 2.4 GHz OFDM, 54 Mbps (radios do 2.3GHz thru 2.6GHz)
802.11h 5 GHz Extension for Europe auto frequency and power control
802.11j 4.9 GHz Extension for Japan (may apply to USA public safety)
802.11k Radio Resource Measurement Extensions
802.11m Maintenance and Management Extensions
802.11n MIMO Extensions (of 12, 24, 48, 96 and 216 Mbps in 40MHz bandwidth)
802.11p WAVE – Moving vehicle Extensions
802.11r Advanced Roaming and Context Transfer
802.11s Mesh Extensions
802.11t Wireless Performance Predictions
802.1x Authentication and Encryption
WPA Wi-Fi Protected Access
WME Wi-Fi Multimedia Extensions
WPA2 Wi-Fi Hot Spot Extensions