National CSS was founded in 1966 initially as Computer Software Systems, performing technical consulting services. By 1968 the founders began to create a timesharing company using IBM’s 360/67 computer based on the CP67 and CMS programs. National CSS, the timesharing company, focused on providing its customers with remote online interactive program development capability and later fourth generation language (4GL) products. NCSS went public in 1970 and, after downsizing during the economic recession of the early 1970s, evolved into a profitable company. NCSS was purchased by Dun & Bradstreet in 1979. Harold Feinleib joined NCSS in 1968 and shares his background in the computer industry and what he and Nick Pisarro did at NCSS to speed up the performance of the VP/CSS operating system in order to generate enough revenue to more than cover its rental and associated costs. This story focuses on events prior to the year 1970.
Feinleib, Harold, author
Computer History Museum
National CSS; NCSS; Feinleib, Harold; VP/CSS; NOMAD; computer timesharing; paging; Virtual memory; IBM 360/67; Virtual machine; Dynamic Address Translation