NEC ACOS System 3600

As a large machine, NEC marketed a compact high-performance computer, the ACOS System 3600 (hereafter referred to as the S3600) as the successor of the ACOS System 610 and 630 in February 1990. The S3600 achieved smaller size, and compared to the ACOS system 610 and 630, it reduced set-up area of the central processing unit to about one-half, cut power consumption to about one-third, and improved arithmetic processing speed by about 2.3 to 3 times. This was achieved by employing (for the first time in the arithmetic processing unit of a general-purpose large computer) BiCMOS logic elements having the characteristics of high-speed and low power consumption, and CMOS logic elements having the characteristics of high-integration and low power consumption, and by using 4-megabit DRAM for the first time in the main memory unit of a general-purpose computer.