The name smiley became commonly used in the 70s and 80s as the yellow and black ideogram began to appear more in popular culture. The ideogram has since been used as a foundation to create emoticon emojis. These are digital interpretations of the smiley ideogram and have since become the most commonly used set of emojis since they adopted by Unicode in 2006 onwards. Smiley has since become a broader term that often includes both the ideogram design, but also emojis that use the same yellow and black design.