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Solid modeling on an IBM PC? One exhibitor at NCGA '83Â¿the National Computer Graphics Association's Fourth Annual Conference and Exposition held June 26-30 in ChicagoÂ¿claimed such capability, while several other vendors demonstrated more conventional 2-D drafting capabilities on the PC. At each summer's round of graphics conferences, certain developments mark the latest direction of the industry. This year, the IBM PC-based systems indicate that graphics manufacturers are turning to a mostly untapped marketÂ¿low-end CAD.