NOR-gate
Symbolic representation:
Truth Table
| Input |
Output |
|
|
P |
Q |
R = ~(P |
|
1 |
1 |
0 |
|
1 |
0 |
0 |
|
0 |
1 |
0 |
|
0 |
0 |
1 |
Remarks: 
is
called a Peirce arrow,
which is the logical symbol corresponding to NOR-gate.
~(P 
Q) 
PQ
