Routes/ routes.js - tells express router what to render for certain requests
node-modules/Angular/
angular.js, ThingController.js - angular controllers that are called in the browser, each section will have its own angular app
Models/
boat.js, customer.js - define mongoose models, what the database entries will look like, assers things about data
API/
inventoryAPI.js - exposes the models to the application as variables for use
Assets/
css and images to use in html and client side javascript
Views/
.html and .jade files - jade is express' templating engine (or one of them) and .html files contain the client side angular "app"