DEC 3000 Model 400/400S AXP

This document provides a technical overview of the DEC 3000 Model 400/400S AXP system. It covers the hardware architecture, including the DECchip 21064 CPU, memory subsystem, and I/O modules, as well as software support including operating systems (OpenVMS AXP and DEC OSF/1 AXP), compilers, and networking. Additionally, it details available graphics options, 3D acceleration architectures, and performance benchmarking for both workstation and server configurations.