1991

The heart of the 6000-600, the NVAX chip, built using 0.75 micrometer CMOS technology was the strongest CISC (complex instruction set computer) processor of the time, with a performance that was comparable to RISC processors. A one-CPU 6000-600 had a performance of 32 VUPs. Several MicroVAXen and VAXstations were also based on the NVAX chip, like the VAX 4000-500, -600, -700 and -100, and the MicroVAX 3100 Model 90.

OpenVMS: Digital parted with its previous policy of mostly implementing proprietary technologies, and modified VMS according to POSIX standards.

DECnet phase V: Another big move by Digital to open DECnet for OSI standards and TCP/IP.