| http://www.w3.org/ns/prov#value | - Soon reader board signs became a niche market of its own as many companies sprung up to fabricate and hang these signs including Daktronics (Brookings, SD), Multimedia Inc. (Rancho Cordova), Act One Communications (Irwinsale, CA), Adaptive Micro Systems (Milwaukee, WI), Trans-Lux (Logan, UT), and Opto Displays (Walnut, CA).
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