9 Aviation headsets and parts thereof, including, microphones, headset connectors, headset covers, headset pads, headset carrying cases, microphone windscreens, and clothing clips; downloadable computer software for dispatch telecommunications; computer hardware for use in management of telecommunications, telephone dispatch, and radio dispatch; gateway and interface adapters; radio frequency transmitters, receivers, and amplifiers with audio output for use with assistive listening systems; radio dispatch systems comprising master stations, speaker stations, head set stations, and related accessories, namely, headsets, handsets, and microphones