# Tutorials and Demo Videos
Use two NDTwin existing applications (for energy-saving and traffic-engineering purposes, respectively) as concrete examples to demonstrate how to run up NDTwin Apps and how they optimize the operations of a network for different purposes.

Canonical URL: https://www.ndtwin.org/docs/tutorials-and-demo-videos/

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## Pages
- [NDTwin Kernel](https://www.ndtwin.org/docs/tutorials-and-demo-videos/ndtwin-kernel/)
- [NDTwin Applications](https://www.ndtwin.org/docs/tutorials-and-demo-videos/ndtwin-applications/)