Shareholders of Skokie, Ill.-based U.S. Robotics Corp....

Shareholders of Skokie, Ill.-based U.S. Robotics Corp. approved Santa Clara-based 3Com Corp.’s $8.54-billion offer for the world’s largest maker of computer modems, completing the largest acquisition ever in the computer networking industry. . . . Mountain View-based Aehr Test Systems plans an initial public offering selling a majority stake in the maker of test equipment used by semiconductor manufacturers. . . . Burbank-based Unihealth named Arnold R. Schaffer president and chief executive of its Glendale Memorial Hospital and Health Center. . . . Richmond, Va.-based Eskimo Pie Corp. agreed to sell its Los Angeles plant to an unidentified food processor for undisclosed terms. The transaction will eliminate 14 jobs and will consolidate its flavors production in New Berlin, Wis.