Soon after the merger, the market for proprietary mainframe-class systems—the mainstream product of Unisys and its competitors such as IBM—began a long-term decline that continues, at a lesser rate, today. In response, Unisys made the strategic decision to shift into high-end servers (e.g., 32 processor Windows Servers), as well as information technology (IT) services such as systems integration, outsourcing, and related technical services, while holding onto the profitable revenue stream from maintaining its installed base of proprietary mainframe hardware and applications.