The Design for All principles define the characteristics which a device should possess in order for it be
utilised by every type of user, independent of his or her sensory disabilities or technological competency.
These principles are realised in the current work as an integrative tool with which to facilitate universal
access to museums via multimedia and portable guides, making access available to all. Based on these
principles, this article describes the main findings of the design and use of the MGA (Multimedia Guides
for All) approach proposed in this paper. This approach involves a series of recommendations for the
selection, application, preparation of content, and maintenance of this type of computerized device, in
order to achieve these principles. Firstly, a comparative analysis of the principal types of electronic guides
available in museums which incorporate accessibility criteria is provided. Subsequently, a real case study
case is presented which conforms to the MGA approach. The MGA approach can be applied to other
domains, which should be explored in further research. The conclusions in this article have been drawn
from two R&D projects financed by the Spanish Ministry of Industry, Science and Technology supported
by the EC FEDER R&D Program.