The product is available in two editions. The Java System Message Queue Platform Edition is an implementation of the Java Message Service (JMS) Specification. It is designed for small-scale deployments and development environments. It is available as a FREE download and is bundled with Solaris and the Sun Java System Application Server 7 (formerly Sun ONE Application Server 7). The Java System Message Queue Enterprise Edition Edition is a high performance messaging system for integrating disparate applications. It is designed for large-scale enterprise deployments and includes key enterprise class features, such as scalability, reliability, and advanced security necessary for large-scale deployments.