Fred Wang, son of founder and chief executive Dr An Wang yesterday resigned with immediate effect as president and chief operating officer of Wang Laboratories Inc. Dr Wang returned to work on a part-time basis on Monday following his cancer operation, and the board has appointed appointed Harry Chou to take over Fred’s posts on an acting basis. It also appointed a committee of three directors under Chou to look for a new president – and former heir presumptive John Cunningham, now at a loose end (see back page, today) seems the obvious candidate. Fred Wang, who was always much more of an engineer than a manager, has agreed to remain on the board and is expected to undertake special projects for the company.