Making this website accessible
A primary aim is to ensure that this web site can be accessed by people with all sorts of disabilities. This especially includes vision problems, including total blindness. But this aim is not restricted to those disabilities.
A secondary aim is to ensure that this web site can be accessed by the greatest range of user systems, including systems such as those in schools and libraries that cannot be significantly configured by the user.
The main techniques are "simplicity" and "predictability".
The size of the text can be adjusted to cater for vision problems in all browsers. "Skip navigation" links are provided for people using speaking browsers.