NEC ACOS-2/EVP

NEC announced ACOS-2/EVP in July 1987 and started shipping it in November of that year. 　ACOS-2/EVP served as the operating system for the ACOS System 3300 series, which fully adopted a CMOS full-customer LSI. It ensured expandability equivalent to that of large computers and provided new software as the core of integration between the computer and communication through creation of basic software equipped with a virtual memory on advanced architecture in which a dispatcher, memory protection and inter-program communication were presented in the form of firmware. In addition, it was also intended to provide functions that facilitated realization of a total system for increasing productivity in office operations.