This document discusses virus taxonomy and classification. It begins by explaining that taxonomy is the science of grouping and naming living organisms, and that viruses are classified based on their genome, replication strategy, and structure. It then discusses the history of virus classification committees and outlines the current hierarchical classification system used, with seven orders, over 100 families, and over 3,000 species of viruses defined. The document concludes by discussing various aspects of virus nomenclature and further classification below the species level.