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Services built with the Akka SDK are automatically clustered and can be deployed on any infrastructure.\n* and [**Akka Automated Operations**](https://doc.akka.io/operations/akka-platform.html), a managed solution that handles everything for Akka SDK services from auto-elasticity to multi-region high availability running safely within your VPC.\n\nThe **Akka SDK** and **Akka Automated Operations** are built upon the foundational [**Akka libraries**](https://doc.akka.io/libraries/akka-dependencies/current/), providing the building blocks for distributed systems.\n\n\n\nAkka Projections\n================\n\nAkka Projections provides an abstraction for consuming a stream of `Envelope` (where `Envelope` contains a payload and a trackable offset). This streams can originate from persisted events, Kafka topics, or other Alpakka connectors. \n\nAkka Projections also provides tools to track, restart and distribute these projections.\n\nReference Documentation\n-----------------------\n\nThe reference documentation for all Akka libraries is available via [doc.akka.io/libraries/](https://doc.akka.io/libraries/), details for the Akka Projections libraries\nfor [Scala](https://doc.akka.io/libraries/akka-projection/current/?language=scala) and [Java](https://doc.akka.io/libraries/akka-projection/current/?language=java).\n\nThe current versions of all Akka libraries are listed on the [Akka Dependencies](https://doc.akka.io/libraries/akka-dependencies/current/) page. 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