ELECTRONICS: INTRO TO COMPUTER ENGINEERING
LOGIC SYMBOLS

These are the basic seven logic symbols. Note that the circle is the actual NOT, and the triangle is like a buffer, therefore anytime you see a circle, it means NOT. These pictures were captured from LogicWorks 4.0.

SYMBOL NAME TRUTH
AND
X Y R
0 0 0
0 1 0
1 0 0
1 1 1
OR
X Y R
0 0 0
0 1 1
1 0 1
1 1 1
NOT
X R
0 1
1 0
NAND
X Y R
0 0 1
0 1 1
1 0 1
1 1 0
NOR
X Y R
0 0 1
0 1 0
1 0 0
1 1 0
XOR*
X Y R
0 0 0
0 1 1
1 0 1
1 1 0
XNOR*
X Y R
0 0 1
0 1 0
1 0 0
1 1 1

*Special thanks to David and PHY107 Other Logic Gates for correcting this error.

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