Over time, emoji meanings have become subjective depending on a message's context and wider cultural trends. Which shaking smiley face should you use? Is there a difference between each different ...

Of the six billion emoji that are sent globally every day, around 70% are emotion based – for example, smiley face, love hearts. A smaller proportion of the emoji sent are sad expressions.

Prof Fahlman posted the ‘sideways smiley’ onto an online computer science board at the university, and others contributed to the thread. Emoticons then reached world-wide discussion systems ...