RT-11
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RT-11 is a discontinued small, low-end, single-user real-time operating system for the full line of Digital Equipment Corporation PDP-11 16-bit computers. RT-11 was first implemented in 1970. It was widely used for real-time computing systems, process control, and data acquisition across all PDP-11s. It was also used for low-cost general-use computing.
The end of the HELP command output from RT-11SJ displayed on a VT100.
Digital Equipment Corporation
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Digital Equipment Corporation, using the trademark Digital, was a major American company in the computer industry from the 1960s to the 1990s. The company was co-founded by Ken Olsen and Harlan Anderson in 1957. Olsen was president until he was forced to resign in 1992, after the company had gone into precipitous decline.
Assabet Woolen Mill, former headquarters of Digital Equipment Corporation from 1957 to 1992
DEC was headquartered at a former wool mill in Maynard, Massachusetts, from 1957 until 1992.
System Building Blocks (System Module) 1103 hex-inverter card (both sides)
PDP-1 System Building Block #4106, circa 1963 - note that one transistor (yellow) has been replaced