A collection of pictograms. Three of them used by the United States National Park Service. A package containing those three and all NPS symbols is available at the Open Icon Library
Disability symbols 16.png
Pictograms-nps-accessibility-wheelchair-accessible.svg
Pictograms-nps-accessibility-low vision access.svg
Pictograms-nps-accessibility-sign language interpretation.svg
Autismbrain.jpg
Disability symbols 16.png: NPS Graphics, put together by Wcommons
Pictograms-nps-accessibility-wheelchair-accessible.svg: NPS Graphics, converted by ZyMOS
Pictograms-nps-accessibility-low vision access.svg: NPS Graphics, converted by ZyMOS
Pictograms-nps-accessibility-sign language interpretation.svg: NPS Graphics, converted by ZyMOS
Autismbrain.jpg: National Institutes of Mental Health, National Institutes of Health
derivative work: Hamiltonham