Advantage Database Server is a relational database management system (RDBMS) for small to medium-sized businesses by Sybase iAnywhere. Database author Cary Jensen describes Advantage as follows: "Advantage has been around since 1993, when it was introduced to provide a stable solution for Clipper developers who were tired of slow performance and corrupt indexes inherent to file server-based databases. Over the years, ADS has grown in both popularity and features.