What means
It marks a one-sixteenth patch in the upper-middle-left of a larger block. The Robotron Z9001, an East German home computer introduced in 1984, displayed graphic characters in text cells so programs could sketch pictures without addressing each pixel separately.
Unicode preserves the old graphics
Unicode began encoding box-drawing and block characters for computer compatibility in 1991, then expanded that preservation work. A 2021 proposal included the Robotron set so exchanged text could preserve its graphics and emulators—programs that imitate older computers—could display them.
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
𜺔\1CE94Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.
