Digital Equipment Corp is far from out of the woods as far as Standard & Poor’s Corp is concerned, and the agency has put its ratings on DEC’s debt under review for possible downgrading. The triple-B senior debt, double-B-plus preferred stock and A-2 commercial paper are all under review for potential downgrade. Standard & Poor’s began the review on April 25, due to continuing losses, heightened business risk, increased uncertainty about DEC’s ability to restore profitability and expected significant cash restructuring charges. It said in early May, after reporting the stunning third-quarter loss, that its entire enterprise could be at risk and that it planned to cut another 20,000 jobs and consider selling parts of its business.