NEC ACOS-2/EF

ACOS-2/EF functioned as the operating system for ACOS System model 410, which adopted a CMOS gate array for the element and a pipeline-control, 4-way processor technology for the central processing unit. With a view to expansion of operations processed by the computer from conventional data processing (DP processing) to office operations, the OS enabled a usage style in which DP processing and OA processing were integrated.