A matter of great import

That's a big list of variables! It all starts with an import statement. If you read through the code addendum at the end of Chapter 4, Code Comfort, you'll remember that C# code requires using declarations that tell Unity we'd like to certain chunks of the code base. The JavaScript keyword import is identical to the C# keyword using. We use it to tell Unity that we're accessing System.Collections.Generic chunk of code, which isn't normally available to us by default. Try typing List<> into your code without the using declaration. Then, add the using declaration and type List<> again. When we declare that we're using System.Colletions.Generic, we get access to a whole new bunch of stuff.

Why do we need access anyway? Because the generic List object we declare a little farther down requires it. But what the heck is a List? It's one in a family of datatypes called Collections, which includes its (perhaps) more well-known cousin, array.

If a variable is a bucket...