The IBM System/36 was a midrange computer marketed by IBM from 1983 to 2000 - a multi-user, multi-tasking successor to the System/34.
IBM System/36
IBM 5360 System Unit
IBM 5362 System Unit
IBM 5364 System Unit
Midrange computers, or midrange systems, were a class of computer systems that fell in between mainframe computers and microcomputers.
IBM System/3, a midrange computer introduced in 1969
The S/38 (without case), the S/36, and the S/34 systems