Information retrieval (IR) is a complex human activity supported by sophisticated systems. Information science has contributed much to the design and evaluation

Class-tested and coherent, this textbook teaches classical and web information retrieval, including web search and the related areas of text classification and

Provides an overview and instruction on the evaluation of interactive information retrieval systems with users.

Web search engines are not just indispensable tools for finding and accessing information online, but have become a defining component of the human condition an