1. A small door or gate or near a larger one.

2. Most brick as a building component or gate, zhao bi, wall decoration.

3. A sluice or gate used to control a flow of water.

4. Magnalocks are designed secure any type of door or gate that closes against a fixed stop.

5. One of the earliest explosive devices was the petard, which was a mine used to breach castle walls or gates.

6. It is the same pattern of 1's and 0's as seen in the truth table for an OR gate.

7. Using the device, the demonstrating and exploring experiments on logical circuit, which includes AND gate, NOT gate, OR gate, are illustrated.

8. A logic circuit that produces an output inverse to that of an OR gate.

9. Then the all basic-circuits are also designed and simulated carefully including active resister, current mirrors, comparator, inverter, AND gate, OR gate.