Typography
Quoting the corresponding Wikipedia page, “Typography is the art and technique of arranging type to make written language legible, readable and appealing when displayed. The arrangement of type involves selecting typefaces, point sizes, line lengths, line-spacing (leading), and letter-spacing (tracking), as well as adjusting the space between pairs of letters (kerning)”. The term typography can also refer to the style, arrangement, and appearance of the letters, numbers, and symbols created by the process.
By definition, it is obvious that typography plays a significant role with regards to accessibility; in fact, it can have a significant impact on content legibility and readability. Studies in the literature have also shown that certain typographic choices can have an impact on how easy people with learning difficulties and cognitive disabilities can read and understand written content.
Typography comes into play when designing almost anything: from paper content to digital publications, including web pages, desktop and mobile applications, books, posters, and so on. Unsurprisingly, there are different accessibility guidelines that can help you out making typographic decisions keeping into account these considerations. In this section you can find references to them, as well as pointers to (hopefully useful) tools and additional support resources you can leverage in the process.