Information is an element of knowledge that can be stored, processed or
transmitted. It is linked to concepts of communication, data, knowledge
or representation. In a context of steady increase in the mass of
information it is difficult to know what information to look for and
where to find them. Computer techniques exist to facilitate this
research and allow relevant information extraction. Recommendation
systems introduced the notions inherent to the recommendation, based,
inter alia, information search, filtering, machine learning,
collaborative approaches. It also deals with the assessment of such
systems and has various applications.