Architecture of computer

1. I/O devices

1.1. Input

1.1.1. Mouse

1.1.2. Keyboard

1.1.3. Scanner

1.1.4. Microphone

1.2. Output

1.2.1. Monitor

1.2.2. Printer

1.2.3. Audio System

2. Main memory

2.1. ROM

2.2. RAM

2.3. Bus

3. CPU

3.1. Control Unit

3.2. ALU

3.3. Register

3.4. Bus