diff --git a/education/computer engineering/ECE2700/Binary Logic.md b/education/computer engineering/ECE2700/Binary Logic.md
index ac05999..8f7f7d1 100644
--- a/education/computer engineering/ECE2700/Binary Logic.md	
+++ b/education/computer engineering/ECE2700/Binary Logic.md	
@@ -6,4 +6,18 @@ A binary NOT gate has a single input, and inverts that input.
 ## Truth Table
 | $x$ | $y$ |
 | --- | --- |
-|     |     |
\ No newline at end of file
+| 0   | 1   |
+| 1   | 0   |
+## Boolean Expression
+A NOT operation is mathematically expressed using a bar:
+$$ y = \bar{x} $$
+# AND Gate
+An AND gate will only output a 1 if *both* inputs are a one.
+
+## Truth Table
+| $x_1$ | $x_2$ | $y$ |
+| ----- | ----- | --- |
+| 0     | 0     | 0   |
+| 0     | 1     | 0   |
+| 1     | 0     | 0   |
+| 1     | 1     | 1   |