Abstract
Software visualization and algorithm animation have been tackled almost exclusively from the visual point of view, this means representation and control occur through the visual channel. This approach has its limitations. To achieve better comprehension, we deal with multimodal interfaces that include other means of interaction together with those of the standard systems for data visualization and algorithm animation. The notion of specific concept keyboards is introduced. As a consequence, modern information and learning systems for algorithm animation are enhanced in such a way that control and interaction take place through appropriate interfaces designed for the special purpose so that not only sighted but also blind users can navigate within these systems. We provide some examples to show the relevance of this new approach.
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