Thin diagonal line running from the middle of the right edge down to the lower left corner, a line-drawing piece from legacy computing.
U+1FBCFLEFT ONE THIRD BLOCKU+1FBD1BOX DRAWINGS LIGHT DIAGONAL UPPER RIGHT TO MIDDLE LEFTU+1FBCELEFT TWO THIRDS BLOCKU+1FBD2BOX DRAWINGS LIGHT DIAGONAL UPPER LEFT TO MIDDLE RIGHTU+1FBCDBLACK SMALL UP-POINTING CHEVRONU+1FBD3BOX DRAWINGS LIGHT DIAGONAL MIDDLE LEFT TO LOWER RIGHTU+1FBCCRAISED SMALL LEFT SQUARE BRACKETU+1FBD4BOX DRAWINGS LIGHT DIAGONAL UPPER LEFT TO LOWER CENTREU+1FBCBWHITE CROSS MARKU+1FBD5BOX DRAWINGS LIGHT DIAGONAL UPPER CENTRE TO LOWER RIGHTU+1FBCAWHITE UP-POINTING CHEVRONU+1FBD6BOX DRAWINGS LIGHT DIAGONAL UPPER RIGHT TO LOWER CENTRE250 characters in the Symbols for Legacy Computing Unicode block, from number 208.
U+1FBD0BOX DRAWINGS LIGHT DIAGONAL MIDDLE RIGHT TO LOWER LEFTU+1FBD1BOX DRAWINGS LIGHT DIAGONAL UPPER RIGHT TO MIDDLE LEFTU+1FBD2BOX DRAWINGS LIGHT DIAGONAL UPPER LEFT TO MIDDLE RIGHTU+1FBD3BOX DRAWINGS LIGHT DIAGONAL MIDDLE LEFT TO LOWER RIGHTU+1FBD4BOX DRAWINGS LIGHT DIAGONAL UPPER LEFT TO LOWER CENTREU+1FBD5BOX DRAWINGS LIGHT DIAGONAL UPPER CENTRE TO LOWER RIGHTU+1FBD6BOX DRAWINGS LIGHT DIAGONAL UPPER RIGHT TO LOWER CENTREU+1FBD7BOX DRAWINGS LIGHT DIAGONAL UPPER CENTRE TO LOWER LEFTU+1FBD8BOX DRAWINGS LIGHT DIAGONAL UPPER LEFT TO MIDDLE CENTRE TO UPPER RIGHTU+1FBD9BOX DRAWINGS LIGHT DIAGONAL UPPER RIGHT TO MIDDLE CENTRE TO LOWER RIGHTU+1FBDABOX DRAWINGS LIGHT DIAGONAL LOWER LEFT TO MIDDLE CENTRE TO LOWER RIGHTU+1FBDBBOX DRAWINGS LIGHT DIAGONAL UPPER LEFT TO MIDDLE CENTRE TO LOWER LEFTU+1FBDCBOX DRAWINGS LIGHT DIAGONAL UPPER LEFT TO LOWER CENTRE TO UPPER RIGHTU+1FBDDBOX DRAWINGS LIGHT DIAGONAL UPPER RIGHT TO MIDDLE LEFT TO LOWER RIGHTU+1FBDEBOX DRAWINGS LIGHT DIAGONAL LOWER LEFT TO UPPER CENTRE TO LOWER RIGHTU+1FBDFBOX DRAWINGS LIGHT DIAGONAL UPPER LEFT TO MIDDLE RIGHT TO LOWER LEFTU+1FBE0TOP JUSTIFIED LOWER HALF WHITE CIRCLEU+1FBE1RIGHT JUSTIFIED LEFT HALF WHITE CIRCLEU+1FBE2BOTTOM JUSTIFIED UPPER HALF WHITE CIRCLEU+1FBE3LEFT JUSTIFIED RIGHT HALF WHITE CIRCLEU+1FBE4UPPER CENTRE ONE QUARTER BLOCKU+1FBE5LOWER CENTRE ONE QUARTER BLOCKU+1FBE6MIDDLE LEFT ONE QUARTER BLOCKU+1FBE7MIDDLE RIGHT ONE QUARTER BLOCKU+1FBE8TOP JUSTIFIED LOWER HALF BLACK CIRCLEU+1FBE9RIGHT JUSTIFIED LEFT HALF BLACK CIRCLEU+1FBEABOTTOM JUSTIFIED UPPER HALF BLACK CIRCLEU+1FBEBLEFT JUSTIFIED RIGHT HALF BLACK CIRCLEU+1FBECTOP RIGHT JUSTIFIED LOWER LEFT QUARTER BLACK CIRCLEU+1FBEDBOTTOM LEFT JUSTIFIED UPPER RIGHT QUARTER BLACK CIRCLEU+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