JSup can be executed in various ways:

• Stand-alone: a single instance of the program provides both the graphic user interface (both desktop and web), the communication with devices (PLC, controllers, ...) and runs all the logic. It's the default running mode for a JSup application.
• Server-only: an instance of the program that only provides the communication with devices (PLC, controller, ...), runs the Shared domain logic, accepts connection from clients. Furthermore it provides the web interface. The server instances can be executed as a Windows service, in that way it will run regardless of the logged on user (if any).
• Client: such JSup instance must be connected to (and depends on, for the Shared domain) a JSup server instance. The server instance can be run on the same PC or in a remote one; the connection is made via TCP/IP, and the used bandwidth is very low. The Client instance provides the desktop graphic user interface (web interface is provided by the Server instance) and runs the User domain logic. See JSup Command line options - Run JSup as a client.
• Web client: see JSup 6 HTML5 web server configuration to enable users to access a JSup application from a web browser.