AWTS Modules are the individual software components you may run in your AWTS environment. Each module serves a specific purpose and serves one or more services such as Market data or News. Your AWTS environment is the sum of all the modules you choose to run.
You can pick and choose which modules to run in the Configurator according to which data vendors you have available and what your needs are from AWTS. In almost all cases your environment should be fronted by the Mux module, the Configurator will guide you one this.
The set of Modules that you run is collectively referred to as your AWTS environment.