Extended Annotated Logic Programming (EALP) for argumentation knowledge and Logic of Multiple-valued Argumentation (LMA) built on top of EALP are outlined together with its implementation. We then explore a new application area of argumentation in the present rapidly growing web technology, and demonstrate the basic features and advantages of Automated Argument System based on Logic of Multiple-Valued Argumentation by specializing it to two argument systems derived from LMA: (i) an argument-based recommender system, and (ii) an integrated system of semantic web reasoning and argument-based reasoning.