PECS/Board Maker Comparison

Explore Picture Exchange Communication System https://pecsusa.com/pecs/ Here is a good, brief explanation (http://autismsupportteam.blogspot.com/search/label/Boardmaker.) about the differences between the two systems. Find one other picture-based communication system of your choice. Create a comparison chart with at least twenty levels/terms/ideas to compare that showcase the strengths and weaknesses of each system.