... applications, 231 32 Internet, 135 introduction to, 1 43 45 n-tier applications, 2 23 push services, 135 37 transaction-based services and, 185 transitive trust, 136 37 WAP, 135 , 156–64 WAP gateway, ... Principles and Applications, Elliott D. Kaplan, editor Understanding WAP: Wireless Applications, Devices, and Services, Marcel van der Heijden and Marcus Taylor, editors Universal Wireless Personal ... See also Services WAP -enabled mobile devices, 99 WAP Forum Ltd., 3, 12, 106, 1 13 WAP gateway, 6–7, 122– 23 billing data interface, 111–12 caching of wireless content, 1 13 compiler and encoder...