Negative OR (NOR) Circuit

NEGATIVE OR (NOR) Circuit

Figures show a TinkerCAD Circuit design for a NEGATIVE OR (NOR) Circuit and its four possible input states, captured when run in simulation mode. In simulation mode,  switches can be turned on or off (ie, Up, or Down) and the circuit will show the result. 
Why the name? Either Switch A or Switch B turns the LED off!

(NOTE:

Switch Down = 0, Switch Up = 1;

LED unlit = 0, LED lit = 1. )