The rest of this thesis is organized as follows. The next chapter is a statement of the problem that is addressed in the rest of this thesis. It presents an overview of the previous work from which ideas have been drawn and introduces the proposed approach to solving the problem. Chapter 3 presents the basic algorithms used to build the information filtering agent. It describes in detail the underlying architecture using which adaptive agents could be built for information filtering. Chapter 4 describes a particular implementation, Newt (acronym for News Tailor), built using the algorithms described in Chapter 3. Efficiency issues are touched upon at the end of the chapter. The experiments performed with Newt and the results obtained are presented in Chapter 5. Chapter 6 contains the concluding remarks and Chapter 7 presents some directions for future work.