What means
It is a bomb pictogram pointed left.
A 2021 Unicode proposal maps this Sharp MZ game sprite to the computer’s European alternate character set. The wider proposal gathers home-computer symbols from the mid-1970s to mid-1980s and teletext graphics from the early 1970s—TV pages made of text and block pictures—for emulators and character-set conversion.
An old-computer graphic with stark nuclear imagery.
Without context, it can come across as a threat.
Don't confuse it with
4Questions people ask
1Why does show as a box on some devices?
Because that device's fonts have no glyph for it. The character is still correct and still copies correctly — the box is a missing glyph, not a broken character.
How to type
𜱠\1CC60Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.
