Integrating technologies for added features and safety for cars

I read few articles about Audi A3 Sedan. I want to go deeper and know more. What are the sound system included in this car? What do you mean by MMI Infotainment? How does hand-writing recognition works and essential with this car? How useful is the voice control? Can I use it only for starting the engine? What is Audi Connect? How does it work? What are the available features for this system? How useful the MMI Navigation Plus? What is ESC and EBD stands for? Please help me. Thank you!
