The electronic indicator board is a type of modernization, using electronic media, of conventional types of communicating with indications and also posts. An electronic indication board differentiates itself in the capacity for fast updates as well as dynamic, real-time interaction. But conceptually it is no different from the billboard, the marquee, and also similar kinds of signage. These digital signboard predecessors date back to more than a hundred years. They remained in analog type, certainly, and their messages were reasonably static, continuing to be unchanged for maybe a week, maybe a month, or perhaps for many years. They were primarily textual, yet commonly consisted of some type of imagery, especially if they were made use of for advertising. It is well known that any type of type of message with consistent (icy) web content soon obtains neglected after a number of duplicated viewings. But there was a non-negligible expenditure associated with updating standard message boards, and a tradeoff to consider. Boosting the decreasing returns experienced from fixed indications had to be evaluated against the price of upgrading them to something fresh.

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