Modern Information Retrieval

It is recognized that today's information professionals need to concentrate their efforts on learning the techniques of computerized IR. Information retrieval (IR) has changed considerably in the last years with the expansion of the Web and the advent of modern and inexpensive graphical user interfaces and mass storage devices. As a result, traditional IR textbooks have become quite out-of-date which has led to the introduction of new IR books recently. For thousands of years people have realize