...Payment Systems and Payment Instruments in the Virtual World To understand electronic payment systems, it is essential to have at least a basic understanding of the underlying technology—not the technology of the Internet (nodes, routers, hubs, TCP/IP, and so on),...

...becomes necessary to bring promising substrata into the laboratory for further processing. In either case it is essential to have at least a basic understanding of the associated insects (Borror et al. 1992). For example, some fungi may be associated only will the larval...