# Data Types The Amazon MemoryDB API contains several data types that various actions use. This section describes each data type in detail. **Note** The order of each element in a data type structure is not guaranteed. Applications should not assume a particular order. The following data types are supported: + [ACL](API_ACL.md) + [ACLPendingChanges](API_ACLPendingChanges.md) + [ACLsUpdateStatus](API_ACLsUpdateStatus.md) + [Authentication](API_Authentication.md) + [AuthenticationMode](API_AuthenticationMode.md) + [AvailabilityZone](API_AvailabilityZone.md) + [Cluster](API_Cluster.md) + [ClusterConfiguration](API_ClusterConfiguration.md) + [ClusterPendingUpdates](API_ClusterPendingUpdates.md) + [Endpoint](API_Endpoint.md) + [EngineVersionInfo](API_EngineVersionInfo.md) + [Event](API_Event.md) + [Filter](API_Filter.md) + [MultiRegionCluster](API_MultiRegionCluster.md) + [Node](API_Node.md) + [Parameter](API_Parameter.md) + [ParameterGroup](API_ParameterGroup.md) + [ParameterNameValue](API_ParameterNameValue.md) + [PendingModifiedServiceUpdate](API_PendingModifiedServiceUpdate.md) + [RecurringCharge](API_RecurringCharge.md) + [RegionalCluster](API_RegionalCluster.md) + [ReplicaConfigurationRequest](API_ReplicaConfigurationRequest.md) + [ReservedNode](API_ReservedNode.md) + [ReservedNodesOffering](API_ReservedNodesOffering.md) + [ReshardingStatus](API_ReshardingStatus.md) + [SecurityGroupMembership](API_SecurityGroupMembership.md) + [ServiceUpdate](API_ServiceUpdate.md) + [ServiceUpdateRequest](API_ServiceUpdateRequest.md) + [Shard](API_Shard.md) + [ShardConfiguration](API_ShardConfiguration.md) + [ShardConfigurationRequest](API_ShardConfigurationRequest.md) + [ShardDetail](API_ShardDetail.md) + [SlotMigration](API_SlotMigration.md) + [Snapshot](API_Snapshot.md) + [Subnet](API_Subnet.md) + [SubnetGroup](API_SubnetGroup.md) + [Tag](API_Tag.md) + [UnprocessedCluster](API_UnprocessedCluster.md) + [User](API_User.md)