Oki LP441s User Manual page 6

Basic Hazard Icons
The triangle sign means 'Be careful'. The content within
the triangle illustrates specific hazards. In this case,
the sign on the below means 'beware of electric shock'.
The circular sign means 'prohibited'. The content
within the circle illustrates a specific prohibition. In this
case the sign below means 'disassembly prohibited'.
The black circular sign means 'must do'. The content
within the sign illustrates specific items that must be
carried out. In this case the sign on the left means 'the
plug must be unplugged from the socket'. Warnings
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