In this badge you will learn about how computer stores many variables in one bundle (collection). You will see why items in a List are referred to by their order (eg first, second, third, …, last – this is called index) while in a Dictionary they are referred to by their name (eg. firstname, surname, height – this is called key).

TODO

As in each badge:

1. watch the three below videos while taking notes.
2. complete the programming notebook for this badge
3. write down in your mini-diary 3 things you learned and 1 you wish you understood better