Audience response systems first came on the meetings scene in the late 1970s, and in large measure the concept remains unchanged: Questions are displayed on a projection screen, and attendees answer using individual keypads. Seconds after the audience is finished voting, responses are tabulated and displayed. The original systems were wired, making setup cumbersome, but wireless keypads have long eclipsed the wired setups. Now, meeting rooms can be equipped with base stations — about one ...

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