NATION

Joe M. Henson is stepping down as president and chief executive of Prime Computer and will be succeeded by former General Electric executive Anthony Craig. Henson, 55, has been Prime’s chief executive since 1981. The Natick, Mass.-based company, which became the second-biggest maker of computer-aided design and manufacturing systems with its acquisition of Computervision Inc. in February, did not give any reason for his departure. Henson said he has no long-term plans other than to attend to personal business and take a lengthy vacation.

Craig, 43, is stepping in immediately as chief operating officer, executive vice president and a member of the board. After a transition of a few months, he will assume Henson’s posts. Craig has been president of GE’s information services division since September, 1986, and previously spent 17 years as a marketing and product management executive for IBM.