One way of communicating with autistic and non-verbal people is through the use of a Picture Exchange Communication ... as the pictures go. [Alain Mauer] has created an open-source PECS board ...

A large body of evidence has established the Picture Exchange Communication System (PECS) as an evidence-based practice to support communication development for children diagnosed with autism spectrum ...

"PECS is a tried-and-tested approach that uses pictures to develop communications skills. It's appropriate for children and adults with a wide range of learning, speech and communication difficulties, ...