 GE met with success in selling computer remote timesharing services provided via distributed centers, on the Mark I Time-Sharing System and formed the Information Processing Centers Business (IPCB) in 1966 renamed six months later as the Information Services Department (ISD).As the power of the mainframes increased, GE replaced the dedicated DATANET 30 (DN-30) communications computers with a multi-tier network composed of DN-30 and other computers forming a world-wide star network topology with redundant circuits and switchers.With the reimplementation of the time-sharing system on GE 635 computers at Dartmouth and the growing network, GE renamed the system the Mark II time sharing service.