Also

* Northrop Grumman Corp. said its board elected Chief Executive Ronald Sugar as chairman to replace Kent Kresa, who is retiring. Sugar, 55, will assume the chairman’s post on Oct. 1 and also retain the titles of CEO and president, the Century City-based company said.

* Procter & Gamble Co. has reached an agreement to purchase the Glide dental floss business from W.L. Gore & Associates for an undisclosed sum.

* Symbol Technologies Inc., the world’s largest seller of bar-code scanners, must pay $218 million in damages to Smart Media of Delaware Inc., a jury decided. The verdict will be appealed, Holtsville, N.Y.-based Symbol said.

* Liberty Media Corp., the company controlled by cable television investor John Malone, completed its $7.68-billion purchase of the 57% of home-shopping network QVC Inc. it didn’t already own.