1. Introduction to Computers

Five components of a computer

1 · Controller: Control system of a computer.

2. operator: the computer's processing system;

　　Logic operation: judge right or wrong things.

　　Math: number crunching.

　　Operator + = calculator controller central processing unit (CPU)

3. Memory: The computer storage systems

　　Memory: living in electrical work, power data read and write properly, power data loss;

　　　　　Advantages: fast read data;

　　　　　Disadvantages: power data loss;

　　External memory: Advantages: the data permanently stored;

　　　　　Cons: Slow to read the data.

4 Input device:

　　Keyboard;

5. Output Device:

　　monitor.

ps: input devices, also known as input, output device, also known as ouput

   The memory can also cried IO devices.