Also

* America Online plans to market a tool this summer that integrates features of two of AOL’s most popular services -- instant messaging and e-mail -- as the AOL Time Warner Inc. unit tries to stem subscriber defections.

* Charles Schwab Corp. had the outlook on its long-term credit rating changed to “negative” from “stable” by Standard & Poor’s. The credit-rating company didn’t change the A-minus rating on San Francisco-based Schwab.

* Terayon Communications Systems Inc., a Santa Clara, Calif., maker of cable modems, said it was eliminating about 100 jobs, or 20% of its workforce, to reduce operating costs.