Hewlett-Packard Co plans to retain all but 100 employees who held corporate positions at the the former Apollo Computer Inc’s Chelmsford, Mass., headquarters facility, but that of the 500 headquarters employees, about 150 people hold positions that are not normally needed in a product division, and it looks to to place about 50 of them elsewhere within the company; those who can’t be placed will leave with a minimum of three months’ salary and other benefits; it says it is making progress integrating marketing, research and development, and field sales and service operations in other aspects of the Apollo consolidation, and expects the process to be completed in about six months.