Concurrently, the company recruited executives who changed the emphasis from offering time-sharing services, for which customers wrote their own applications, to a service providing application programs. The first of these new executives was Robert Tillson, who quit Service Bureau Corporation (then a subsidiary of Control Data Corporation, but originally formed as a division of IBM) to become CompuServe's Executive Vice President of Marketing. He then recruited Charles McCall (who succeeded Jeff Wilkins as CEO, and later became CEO of the medical information company HBO & Co.), Maury Cox (who became CEO after the departure of McCall), and Robert Massey (who succeeded Cox as CEO).
concurrently the company recruited executives who changed the emphasis from offering time-sharing services for which customers wrote their own applications to a service providing application programs the first of these new executives was robert tillson who quit service bureau corporation (then a subsidiary of control data corporation but originally formed as a division of ibm) to become compuserve's executive vice president of marketing he then recruited charles mccall (who succeeded jeff wilkins as ceo and later became ceo of the medical information company hbo & co) maury cox (who became ceo after the departure of mccall) and robert massey (who succeeded cox as ceo)