In January 2009, Harwell was named chairwoman of the Commerce Committee.

She was named chairwoman and president two years ago.

Mrs. Graham was named chairwoman of a newly formed executive committee and will remain active in reviewing the operations of the company.

Jane Maas, who has been serving in that position, has been named chairwoman.

Last month she was named chairwoman of Columbia University's anthropology department, where she has a spare office in a dreary corner of a scruffy building.

In 1983 she was named chairwoman of the economics department.

The same year, she was named chairwoman of the Democratic National Convention, which nominated Bill Clinton for president for the first time.

As to her being named chairwoman, Mr. Redstone said, "No decision has been made and, in any case, nothing would happen until after I am gone."

She continued to serve until 1976 and was named chairwoman in 1975.

He succeeds Pamela Maphis Larrick, chief executive since 2001, who was named chairwoman.