This research project will carry out fundamental research in the field of information and communication technologies and partly in the humanities and social sciences on the availability / improvement of digital accessibility of diverse objects and knowledge for people with visual and cognitive disabilities. The research will be focused on (1) research and creation of new methods and models for assessing digital accessibility of various objects: documents, sites, software and serious games; (2) systematization of the existing means and technologies for digital accessibility of such objects; (3) development of conceptual models summarizing good practices; (4) creation, selection and publication of a collection of digital resources in the field for educational purposes. The researched area is especially relevant, but insufficiently observed in Bulgaria, and at the same time a priority area in the European scientific community.