Apelon is very pleased to announce general availability of Version 4.0 of the Distributed Terminology System (DTS). For over fifteen years, DTS has been the industry's leading vocabulary server supporting the creation, maintenance and deployment of healthcare terminologies. Recently made available as an open source project, DTS is a comprehensive solution for the deployment of standardized terminologies, with local enhancements, into distributed application environments. DTS creates a platform for robust data standardization and interoperability for EHRs, HIEs, and decision support systems by establishing a single common resource for an organization's terminology assets. Being open source, DTS also provides significant cost, integration and adoption advantages compared to proprietary solutions.