MobileCommerce (m-commerce) are electronic transactions over the web / PSTN characterised by the use of WirelessDevices to acquire and pay for goods and services.
It has similarities to the web based e-commerce marketplace with these caveats:
Resources
see also WirelessApplicationProtocol, MobileIp, JavaMicroEdition, WirelessMarkupLanguage, MobileGui, MobileInformationDeviceProfile, WindowsMobile, OnlinePayments