However, when pictographs were used, 80% of the information was absorbed by the patient.

BBC: Patients 'don't listen to their doctors'

Those little bulbs light up, primarily in red or green, to communicate through simple pictographs.

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The app Image It lets you quickly look up travel-relevant pictographs, such as a drawing of a stamp to indicate you want to buy one to mail a postcard, from an array of travel-related topics, from food to transport and medical emergency to shopping.

BBC: Google��s lesser-known travel apps