The DS3800XCIA board is part of the Mark IV turbine control system from General Electric. This system, which is one of many Speedtronic systems available from GE, has been used for decades to monitor and regulate industrial gas and steam turbine systems. Multiple microprocessor-based controllers were used to build the Mark IV, which boosted the system's reliability. While the DS3800XCIA board has been phased out by the original equipment manufacturer, it is still available from WOC's extensive inventory of aftermarket General Electric replacement components.