1. Models of Computation

2. Computation: Computation is a general term for any type of information processing information processing CPU memory

3. CPU input memory output memory Program memory temporary memory

4. CPU input memory output memory Program memory temporary memory compute Example:

5. CPU input memory output memory Program memory temporary memory compute

6. CPU input memory output memory Program memory temporary memory compute

7. CPU input memory output memory Program memory temporary memory compute

8. Automaton CPU input memory output memory Program memory temporary memory Automaton

9. Different Kinds of Automata Automata are distinguished by the temporary memory Finite Automata: no temporary memory Pushdown Automata: stack Turing Machines: random access memory

10. input memory output memory temporary memory Finite Automaton Finite Automaton Example: Vending Machines (small computing power)

11. input memory output memory Stack Pushdown Automaton Pushdown Automaton Example: Compilers for Programming Languages (medium computing power) Push, Pop

12. input memory output memory Random Access Memory Turing Machine Turing Machine Examples: Any Algorithm (highest computing power)

13. Finite Automata Pushdown Automata Turing Machine Power of Automata Less powerMore power Solve more computational problems