Topic summary
Audience response systems

Extracted from the Wikipedia article Audience response.
Audience Response systems
An Audience Response system (ARS), or Personal Response System (PRS), allows large groups of people to vote on a topic or answer a question. Depending on the solution chosen, each person has a device with which selections can be made or a mobile device that they can use to respond. In a hardware solution, each remote communicates with a computer via receivers located around the room or via a single receiver connected to the presenter's computer using a USB connector. In a software solution, each device communicates with the question via SMS or the internet. After a set time–or after all participants have answered–the system ends the polling for that particular question and tabulates the results. Typically, the results are instantly made available to the participants via a bar graph displayed on the projector or viewed in a web browser for some systems.