Tokyo -- Standard&Poor's CreditWire 1/27/98 -- Standard&Poor's today assigned its preliminary single-'A' rating to the Y300 billion domestic bond shelf registration of Toshiba Corp. Standard&Poor's at the same time affirmed its long- and short- ratings on Toshiba and related entities: Toshiba America Inc., Toshiba America Capital Corp., Toshiba Capital (Asia) Ltd., Toshiba International Finance (Netherlands) B.V., Toshiba International Finance (U.K.) PLC, and Dominion Semiconductor L.L.C. (see list of ratings below). In addition, Standard&Poor's revised the outlook on Toshiba's long-term rating to negative from stable. The outlook revision reflects increasing pressure on Toshiba's earnings, which is impeding the company's ongoing efforts to reduce debt. Toshiba currently projects pretax income of Y10 billion in