MCA Inc. reported that it will withdraw...

MCA Inc. reported that it will withdraw its proposed public offering of $200 million of convertible subordinated debentures because of market conditions . . . Standard & Poor’s has placed Revlon’s A+ senior, A subordinated, and A-1 commercial paper ratings on “credit watch” with negative implications . . . World Airways reported a 23% increase in July traffic to 452.4 million revenue passenger miles . . . Cray Research reported that Du Pont has ordered a CRAY-1 computer system, the first supercomputer to be installed in the chemical industry.