Architecture of computer

1. BIOS(basic input/output system)

2. Peripheral devices

2.1. output devices

2.1.1. speakers

2.1.2. printer

2.1.3. projector

2.2. input devises

2.2.1. mouse

2.2.2. keyboard

2.2.3. digital cameras

2.2.4. joystick

3. External storage

3.1. Hard disk

3.2. CD/DVD

3.3. optical media

3.4. magnetic tape

3.5. Flash memory

4. CPU

4.1. Control Unit

4.2. Arithmetic Logic Unit

4.3. Registers

5. Main memory

5.1. RAM(Random Access Memory)

5.1.1. DRAM (Dynamic RAM)

5.1.2. SRAM (Static RAM)

5.2. ROM(Read Only Memory)