Let's implement the add functionality by showing a form and submitting the contact data using a POST request.

1. Introduction to Services
2. Setting Up
3. Building the Contacts app
4. Value service
5. Constant Service and sharing functions
6. Factory Service
7. The Service service
8. Angular Factory vs Service
9. Creating and using Services
10. Running a fake REST API
11. $http
12. Asyc JavaScript and callbacks
13. Promises
14. REST API from service
15. Saving updated data using PUT
16. Handling success messaging
17. Handling HTTP Errors
18. Adding data using POST
19. Course Summary

Learn about services in AngularJS - an important concept to learn when building client side applications in AngularJS. Learn how to create services, as well as use the existing out-of-the-box services that come with Angular.