“Concept maps have long provided visual languages widely used in many different disciplines and application domains. This article reports experience in taking an existing open architecture concept mapping tool and making it available on the Web in a number of ways: as a client helper downloading and uploading concept maps; as an active controller of the browser, indexing multimedia material through URLs embedded in concept maps; as a concept map creator controlled by the browser, generating concept maps through the browsing process; and as an auxiliary HTTP server making concept maps available as clickable maps for users who do not have the client helper or want to use active concept maps embedded in documents.”