2. Motors
        a. Stability
        b. Sync
        c. Close loop
        
    3. Sound
        a. Tune 
        b. Music
    
    4. Screen
        a. LED Matrix
        b. LCD
        c. VGA

    5. Touch
        a. Buttons
        b. Touch screens

    6. Remote Control
        a. IR / Bluetooth
        b. Android apps.
    
    7. Camera
    
    8. RTOS
    
    9. App demo and interface.