Image by Ralph Hockens via Flickr- Electronic variable message centers are computerized programmable electronic visual communication devices. They are capable of storing and displaying multiple messages in dozens of formats and at varying intervals. Similar to reader boards, they allow their owners to change copy frequently, but without the cost of replacing missing or broken letters, and without the physical labor involved in changing copy.
Unlike the traditional reader boards, the message on an EMC can easily be changed throughout the day or week to suit the demographics of the people passing by. This allows the business owner to advertise specials, display public service information, or provide other items of public interest in a manner quickly and easily read by those passing by at any given time. Consequently, the effectiveness of an electronic message center is not limited by the space or surface area constraints that hamper business communication on reader boards.
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