Ключевые слова: accessibility, alphabet, audio, background, black, business, button, caption, captioning, cc, closed, collection, communication, concept, deaf, design, disability, disabled, element, file, flat, graphic, icon, illustration, isolated, language, letter, line, media, modern, multimedia, music, outline, pictogram, play, player, screen, set, shape, sign, simple, sound, subtitle, symbol, text, video, web, white,