nationwide X.25 packet network essentially out-of-bounds for Telidon-based services. There were also many widely held misperceptions concerning the graphics resolution and colour resolution that slowed business acceptance. Byte magazine once described it as "low resolution", when the coding system was, in fact, capable of 224 resolution in 8-byte mode. There was also a pronounced emphasis in government and Telco circles on "hardware decoding" even after very capable PC-based software decoders became readily available. This emphasis on special single-purpose hardware was yet another impediment to the widespread adoption of the system. Services included: Grassroots Canada by InfoMart, Toronto Teleguide, A kiosk-based service emphasizing tourist information in Toronto by InfoMart, and in San Francisco by The Chronicle, in Phoenix by The Arizona Republic and in Las Vegas by The Las Vegas Sun. NAPLPS-based systems (Teleguide) were also used for an interactive Mall directory system in various locations, including the world's largest indoor mall, West Edmonton Mall (1985) and the Toronto Eaton Center. It was also used for an interactive multipoint audio-graphic educational teleconferencing system (1987) that predated today's shared interactive whiteboard systems such as those used by Blackboard and Desire2Learn. United States One of the earliest experiments with marketing videotex to consumers in the U.S. was by Radio Shack, which sold a consumer videotex terminal, essentially a single-purpose predecessor to the TRS-80 Color Computer, in outlets across the country. Sales were anemic. Radio Shack later sold a videotex software and hardware package for the Color Computer. In an attempt to capitalize on the European experience, a number of US-based media firms started their own videotex systems in the early 1980s. Among them were Knight-Ridder, the Los Angeles Times, and Field Enterprises in Chicago, which launched Keyfax. The Fort Worth Star-Telegram partnered with Radio Shack to launch StarText (Radio Shack was headquartered in Fort Worth). Unlike the UK, however, the FCC refused to set a single technical standard, so each provider could choose what it wished. Some selected Telidon (now standardized as NAPLPS) but the majority decided to use slight-modified versions of the Prestel hardware. StarText used proprietary software developed at the Star-Telegram. Rolled out across the country from 1982 to 1984, all of the services quickly died. None, except StarText, remained in operation after two years from their respective launch dates. StarText remained in operation until the late 1990s, when it was moved to the web. The primary problem was that the