Quarter of a black circle, the upper-left quadrant, drawn pushed into the bottom right of the cell; a retro terminal and legacy computing block graphic.
U+1FBEDBOTTOM LEFT JUSTIFIED UPPER RIGHT QUARTER BLACK CIRCLEU+1FBEFTOP LEFT JUSTIFIED LOWER RIGHT QUARTER BLACK CIRCLEU+1FBECTOP RIGHT JUSTIFIED LOWER LEFT QUARTER BLACK CIRCLEU+1FBF0SEGMENTED DIGIT ZEROU+1FBEBLEFT JUSTIFIED RIGHT HALF BLACK CIRCLEU+1FBF1SEGMENTED DIGIT ONEU+1FBEABOTTOM JUSTIFIED UPPER HALF BLACK CIRCLEU+1FBF2SEGMENTED DIGIT TWOU+1FBE9RIGHT JUSTIFIED LEFT HALF BLACK CIRCLEU+1FBF3SEGMENTED DIGIT THREEU+1FBE8TOP JUSTIFIED LOWER HALF BLACK CIRCLEU+1FBF4SEGMENTED DIGIT FOUR250 characters in the Symbols for Legacy Computing Unicode block, from number 238.
U+1FBEEBOTTOM RIGHT JUSTIFIED UPPER LEFT QUARTER BLACK CIRCLEU+1FBEFTOP LEFT JUSTIFIED LOWER RIGHT QUARTER BLACK CIRCLEU+1FBF0SEGMENTED DIGIT ZEROU+1FBF1SEGMENTED DIGIT ONEU+1FBF2SEGMENTED DIGIT TWOU+1FBF3SEGMENTED DIGIT THREEU+1FBF4SEGMENTED DIGIT FOURU+1FBF5SEGMENTED DIGIT FIVEU+1FBF6SEGMENTED DIGIT SIXU+1FBF7SEGMENTED DIGIT SEVENU+1FBF8SEGMENTED DIGIT EIGHTU+1FBF9SEGMENTED DIGIT NINEU+1FBFAALARM BELL SYMBOL