Definitions for "DECsystem"
a server that uses a serial console
DECsystem was a line of server computers from Digital Equipment Corporation. They were based on MIPS architecture processors and ran DEC's version of the UNIX operating system, called Ultrix. They ranged in size from workstation-style desktop enclosures to large pedestal cabinets.
a machine with no graphics card and a DECstation is a machine with a graphics card