# Differences in Amazon EMR 4.x release versions Documentation for Amazon EMR features in the *Amazon EMR Management Guide* specify the Amazon EMR release version that a feature became available, as well as applicable differences between Amazon EMR features dating back to 4.0.0. Beginning with Amazon EMR release version 5.0.0, some applications got a significant version upgrade that changed installation or operational details, and others were promoted from sandbox applications to native applications. Each topic in this section provides notable application-specific differences when using Amazon EMR 4.x release versions. **Topics** + [Sandbox applications](emr-sandbox-apps-4x.md) + [Considerations for using Hive on Amazon EMR 4.x](emr-Hive-4x.md) + [Considerations for using Pig on Amazon EMR 4.x](emr-Pig-4x.md)