A no-smoking sign is a visual communication tool used to indicate that smoking is prohibited in a specific area or setting. These signs are designed to promote public health, protect individuals from secondhand smoke, and prevent fire hazards.

No vaping signs are visual indicators prohibiting electronic cigarettes or vaping devices in designated areas. These signs are becoming increasingly common in public places, workplaces, and healthcare settings to promote respiratory health and protect non-vapers from secondhand aerosol exposure.