# Working with public parameters in Parameter Store
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Some Amazon Web Services services publish information about common artifacts as Amazon Systems Manager *public* parameters. For example, the Amazon Elastic Compute Cloud (Amazon EC2) service publishes information about Amazon Machine Images (AMIs) as public parameters.

**Topics**
+ [Discovering public parameters in Parameter Store](parameter-store-finding-public-parameters.md)
+ [Calling AMI public parameters in Parameter Store](parameter-store-public-parameters-ami.md)
+ [Calling the ECS optimized AMI public parameter in Parameter Store](parameter-store-public-parameters-ecs.md)
+ [Calling the EKS optimized AMI public parameter in Parameter Store](parameter-store-public-parameters-eks.md)
+ [Calling public parameters for Amazon Web Services services, Regions, endpoints, Availability Zones, local zones, and Wavelength Zones in Parameter Store](parameter-store-public-parameters-global-infrastructure.md)