For me, these are the most useful electrical equipment from exercise 6:
1- Mobile phone: Nowadays it's dificult to imagine our life without mobil phone.
2- Laptop computer: it is very useful for to work anywhere.
3- Microvave oven: Is perfect for our busy life, because it helps us to eat fast and hot.
4- Memory card: small and useful for save a lot of documents, pictures and videos.
5- Remote control: it's the best gadget, if you don't want to do nothing more than to press a button from your sofa.