Dell Computer Corp, Austin, Texas gets taken more and more seriously with every year that passes as it succeeds in sidestepping the manifold pitfalls in its high-risk business: in recognition, Standard & Poor’s Corp has raised its corporate credit rating to triple-B-minus from double-B, and revised the outlook to stable from positive. The upgrade reflects the company’s improved market position, consistent profitability and strengthened financial profile, offset by highly competitive personal computer industry conditions, the agency said. But while Dell’s low-cost manufacturing model and conservative financial profile should mitigate the risk of a rating decline, the upside potential is limited by highly competitive industry conditions.