U0001F

Unicode for emoticons that people use in texting. Whereas emojis can be seen on Apple and Android devices, on computers they're wrongly displayed as code.
There are many different variations of this code. "U0001F" is the base, and includes additional numbers for a certain kind of emoji.

U0001F632 = Astonished

U0001f602 = Laughing Until Crying

U0001f604 = Smiling Face With Open Mouth and Smiling Eyes

U0001f607 = Smiling Face with Halo