DECstation
![DECstation 5000/200 with top cover removed.](/Images/godic/202501/08/DECstation-5000-200-hdr-0a1134.jpg")
![DECstation 2100.](/Images/godic/202501/08/Ds2100-011134.jpg")
![DECStation 5000 133 Workstation.](/Images/godic/202501/08/Ds5000-011134.jpg")
The DECstation was a brand of computers used by DEC, and refers to three distinct lines of computer systems—the first released in 1978 as a word processing system, and the latter (more widely known) two both released in 1989. These comprised a range of computer workstations based on the MIPS architecture and a range of PC compatibles. The MIPS-based workstations ran Ultrix, a DEC-proprietary version of UNIX, and early releases of OSF/1.