national audience The human-machine interaction for information research is a key issue for different disciplines: information sciences, languages, cognitive psychology and informatics. Indeed, the search for information is no longer reserved for an expert user group. Different types of users are now concerned: researchers and information professionals, who have long been specialists in this activity, have come together with engineers, technicians or ordinary citizens. The information search activity is diversifying and can be operational, leisure or problem-solving. At the same time, the activity of information research is expanding, as it tends to be no longer only information gathering but also processing, annotation, evaluation and management of the data collected. Finally, the expectations for information search interfaces are becoming increasingly important and in line with the ever-increasing requirements for technological tools: users ask for a simple and high-performing tool that combines speed and reliability and offers functionalities that go beyond the collection of information. It is therefore necessary to consider the information search interfaces to be offered to different types of users according to their different needs. For the problems of human-machine interaction engineering (MMI), the use of different disciplinary fields is a necessity. Introduction — Céline Paganelli — GRESEC (Stendhal University), IUT 2 (Pierre Mendès France University), Grenoble. Human-machine interaction engineering: retrospective and perspectives -Gaëlle CALVARY — CLIPS-IMAG, Joseph Fourier University, Grenoble. Interfaces for information research — Jean-Pierre CHEVALLET — CLIPS-IMAG, IUT 2 (Pierre Mendès France University), Grenoble, Laurence NIGAY — CLIPS-IMAG, Joseph Fourier University, Grenoble. Document systems and library management systems: place and role of the professional operator — Evelyne MOUNIER — GRESEC (Stendhal University), IUP Métiers du Book (Pierre Mendès France University), Grenoble. Searching for information: cognitive process, factors of difficulty and dimension of expertise — Jérôme DINET — Laboratoire des Sciences de l’Education, Louis Pasteur University, Strasbourg, Jean-François Rouet — LACO, CNRS, Poitiers. Interpreting the user’s aims in the written human-machine dialogue: towards a linguistic model — Catherine Chanet — LPL, University of Provence, Aix-en-Provence. Towards a system for consulting large technical documents by expert users: the SYSRIT -Céline Paganelli system, Evelyne MOUNIER. Hyperdialogue -José ROUILLARD — trigone Laboratoire, Lille University of Science and Technology. Collection of textual information on the web from different perspectives — Philippe LAUBLET, Leila NAIT-BAHA, Agata JACKIEWICZ, Brahim DJIOUA — LaLICC, University of Paris-Sorbonne. Computer aided reading stations (PLAO) — Arnaud Pelfrene — CID (ENS Letters and Humanities), Lyon.