Central Processing Unit (CPU)

CU

ALU

Memory
RAM
    DRAM
    Static RAM (SRAM)

ROM

Mother Board

System Clock

 Power Supply

Peripheral Devices

Different Types of Ports

Serial Port

Video Card Port

Parallel Port

PS/2 Port

USB Port

Ethernet (Network) Port

Input and output devices

Input Devices

The Mouse and Trackball
Joysticks
Key board
The Touch screen
Light Pen
The Scanner

Other Input Devices

Output Devices

Monitors
Printers
Plotters
Image Setters
Sound Systems

Storage Devices

Primary storage or memory devices

Secondary Storage

Magnetic devices

    Floppy Disks and Drives

    Hard Disks and Drives

    Magnetic TapeOptical Disks 

   CD-ROM

    Write Once Read Many Disk (WORM)

    Rewritable Compact Disk 

   Digital Video Disc or Digital Versatile Disc (DVD)

Magneto-Optical