In the Perl community, DBI is a database abstraction layer (read more about DBI here and here). Using this layer, an application can access a number of different data sources using a single, common API. There's even a DBI Tutorial.
This tutorial provides an overview of Amazon Web Services (AWS). AWS exposes raw product information and key parts of Amazon.com technology to third-party developers for use in their applications. After describing how AWS works in general, the tutorial focuses on the main AWS service, called the Amazon E-Commerce Service (ECS). As part of this tutorial, you will develop a small Web application that uses ECS to display book and music information.
You will need to register for an IBM Identifier in order to access this tutorial.