Accessing OATS
Often, the main challenge of making good software is getting the user interface right. This is particularly relevant when considering people with disabilities...
Like good design, OATS software needs to
design the interface to the user - some users will be able to use a keyboard,
some will be able to use a keyboard slowly with errors, some will only be
able to use a mouse, some will be able to use a joystick, some will be able
to use 4 switches, some will only be able to use 2 switches, and some (many
that are seen by EAT services such as ACT) will only be able to use a single
switch. That is ONE bit of access (or less). Consider that every time
you press a keyboard key you transmit 5-6bits of information and you can see
the challenge.
If you want to understand about the range of different inputs that uses of Assistive Technology Software may need, then you could start by reading 'Switch Access to Technology - A comprehensive Guide' .

