# Function packages for AWS TNB
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A function package is a .zip file in CSAR (Cloud Service Archive) format that contains a network function (an ETSI standard telecommunication application) and function package descriptor that uses the TOSCA standard to describe how the network functions should run on your network.

**Topics**
+ [Create a function package in AWS TNB](create-function-package.md)
+ [View a function package in AWS TNB](view-function-package.md)
+ [Download a function package from AWS TNB](download-function-package.md)
+ [Delete a function package from AWS TNB](delete-function-package.md)