The world of non-verbal autism is changing thanks to assistive technology. When I was small, the best I got as a communication tool was PECS pictograms. For those not familiar with PECS, it is a system of basic needs communication and it looks like this.
In recent years, new devices have flourished. I started communicating on a letter board, a low tech way to point to letters. I still use this method often because it is fast, portable, and if I mess up a board there is no loss of expensive equipment. Here are some types of letter boards.
And mine has a math side too.
Now I have been using a dynawrite also with word prediction and voice output.
Some kids use a fusion,
or an iPad. Recently many non-verbal kids I know switched to iPads and like it. It shows their work in stored memory which is good for school.
The thing is, any method involving letters needs to be taught because autism limits the motor planning to do typing or pointing clearly. None of us learned this skill in school. We all went to someone who had to patiently teach us how to express our thoughts in this modality. Then our moms worked really hard with us at home. The journey to communication is long and hard and starts with the opening of a door.