Web browsers are Serena Release Automation's most common client (agents are discussed in another topic, see the Agents section), but other clients can be developed to access the web services. Clients are deployed locally (on the same LAN as the Serena Release Automation server) or remotely, and communicate with the server via HTTP or HTTPS. The Serena Release Automation browser-based GUI is a Rich Internet Application (RIA) that maintains much of its functionality in the browser. Clients interact with RESTful (representational state transfer) services on the server as needed. A command line client is available that provides most of features found in the browser-based GUI. The command line client is also built on top of RESTful services.