[ISM] stands for "Industrial, Scientific and Medical". It refers to several radio bands left "unlicensed" due to several issues. The 2.4GHz [ISM] band is being made available "unlicensed" due to noise radiated from devices, the most common being microwave ovens. It's also becoming useful for technologies such as Wireless LANs, [bluetooth Bluetooth], cordless telephones, baby monitors, security monitoring, and several other applications using [SpreadSpectrum spread spectrum] technology. In Australia, The [ACA] have allocated the following [ISM] bands: * 6.765 MHz to 7 MHz * 13.41 MHz to 13.57 MHz * 26.175 MHz to 27.5 MHz (CB-Radio fits within there) * 39 MHz to 41 MHz * 902 MHz to 928 MHz (Very common with cordless telephones, and older WLAN technology) * 2.4 GHz to 2.4835 GHz (Sometimes called "''The'' [ISM] Band") * 5.725 GHz to 5.83 GHz * 24.05 GHz to 24.25 GHz * 59.3 GHz to 64 GHz * 122.25 GHz to 123 GHz * 241 GHz to 248 GHz (Note: I must admit some of these frequencies aren't accurate. Check the [ACA]'s website for more information)