An increasingly common form of computing is computation in response to recently occurring events. These might be newly arrived or changed data, such as an uploaded Amazon S3 image file or an update to an Amazon DynamoDB table, or they might be changes in the state of some system or service, such as termination of an EC2 instance. Support for this form of computing requires both a means of efficiently surfacing events as a sequence of change records, as well as frameworks for processing such change logs. This session provides an overview of how AWS intends to facilitate event-driven computing through support for both change logs as well as various means of processing them.