. In this paper, we present AROM a new object-based knowledge representation system, and related to it, WebAROM, an application allowing the consultation and the edition of AROM knowledge bases through the WWW. The AROM knowledge representation model is an object-based knowledge representation model which shows to be original in two ways. First, in addition to the traditional concept of class, it supports a second type of entity, associations, for the representation of factual and structural knowledge concerning an application domain. Second, AROM also integrates an algebraic modeling language which eases the description of operational knowledge (equations, constraints and queries) in a declarative manner. The objective of WebAROM is to facilitate the diffusion and the evolution of the contents of knowledge bases written in the AROM representation model. The World Wide Web proves to be a media to meet these aims. Using simple off-the-shelf web browsers, several users can s...