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IB DP Computer Science — A1 Computer fundamentals — Data representation and computer logic | SL | A1.2.3
📋 What You Will Learn
- Describe the purpose of logic gates and their role in binary computing
- State the function of each Boolean operator: AND, OR, NOT, NAND, NOR, XOR, XNOR
- Recognise each gate's standard symbol and write its Boolean notation
- Give the exact output of every gate for every input combination
- Describe applications of gates in computer systems: arithmetic, comparison, control, memory
🚪 Why This Matters A club door with two bouncers who both must nod is an AND gate; a door that opens if either nods is an OR gate. Computers make every "decision" — adding numbers, comparing passwords, deciding whether to branch — by wiring millions of such tiny yes/no decision-makers together.