NEC ACOS-6/NVX PX

ACOS-6/NVX PX (which stood for “parallel extended”) was an operating system designed for NEC’s large mainframes. NEC announced the operating system in March 1996 and started shipments in December 1996. ACOS-6/NVX PX was an operating system for large and very-large mainframes that supported software resources from the previous large mainframe operating system ACOS-6/NVX while implementing parallel processing technology using the high-performance CMOS processors on the System PX7900, a Parallel ACOS mainframe that was released at the same time as the operating system. ACOS-6/NVX PX was installed on System PX7900 machines.