- Oracle E-Business Suite (EBS) is a suite of integrated enterprise resource planning software modules that help large organizations manage their business and automate many back office functions. - EBS has a three-tier architecture with a desktop tier, application tier, and database tier. The application tier runs on Oracle Application Server and contains web, forms, and concurrent processing services. The database tier stores all application data in an Oracle database. - EBS Release 12 introduced a new instance home directory that separates configuration files from shared application code. This makes management and maintenance easier by keeping instance-specific data separate.