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e.g. "templates" or "datastore"

# Introduction

Welcome to Google App Engine! Creating an App Engine application is easy, and only takes a few minutes. And it's free to start: upload your app and share it with users right away, at no charge and with no commitment required.

Google App Engine applications can currently be written in Java, Python, or Go. This tutorial covers Python. If you're more likely to use Java to build your applications, see Getting Started: Java. If you want to use Go, see Getting Started: Go.

In this tutorial, you will learn how to:

- build an App Engine application using Python
- use the "webapp" web application framework
- use the App Engine datastore with the Python modeling API
- integrate an App Engine application with Google Accounts for user authentication
- use Django templates with your app
- upload your app to App Engine

By the end of the tutorial, you will have implemented a working application, a simple guest book that lets users post messages to a public message board.

## Next...

To get started developing Google App Engine applications, you download and set up the App Engine software development kit.

Continue to The Development Environment.