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  • Collection: Digital Equipment Corporation

2026.155e.jpg
An enlarged copy of a Hager cartoon that hung in Jack Knowles, Engineer, office as a competition reminder. The "Watch out for the competition" statement was added by DEC.

mhs-2026.76.pdf
A partial review of the engineering culture at DEC praising and critiquing the strurcture the company has developed.

mhs-2026.73.pdf
This is a 1991 DEC employee directory of services in the Mill complex including phone numbers, times of operation, and location: building number, floor, pole number (e.g., MLO3-1, Pole 46C). The brochure also included a map of the complex and the…

mhs-2026.72.pdf
A faded list of the characteristics that define real "Millrats", a DEC cultural term (of sorts) for a Digital employee who has worked in the Maynard Mill for a long time.

mhs-2026.71.pdf
This is a 1990 DEC employee guide to the available conference rooms within the Mill Complex . The company named conference rooms after people and other cultural references to Maynard and the vicinity and Digital Equipment Corporation history.

mhs-2026.69.jpg
A photograph of the KDF-11B is a CPU processor module developed by Digital Equipment Corporation (DEC) for its PDP-11 family of 16-bit minicomputers. The KDF-11B board is associated with the PDP-11/23+.

Technically, the KDF-11B is a quad-height…

mhs-2026.68.jpg
This is a marketing photograph of a late 1960s / early 1970s Digital Equipment Corporation computer module. While no model number is visible, based on labeling and other photographs that accompanied it, it appears to be a PDP-9 A-D Converter Option:…

mhs-2026.67.jpg
A photo of a Digital Equipment Corporation wire-wrapped backplane assembly for the PDP-9 computer.

This photograph demonstrates the design philosophy of DEC computer design in the late 1960s and early 1970s: a wire-wrapped (no solder) insulated…

mhs-2026.66.jpg
A Digital Equipment Corporation PDP-9 being manufactured/tested within a lab in the Mill complex.

A note states that the gentleman in the right side of the photo is Frank Capone.

The notation at the bottom of the photograph implies that this…

mhs-2026.65.jpg
A photo of what is possibly a PDP-9 4K magnetic core memory module / backplane assembly using coincident-current magnetic core memory (see COINC DUAL label)

The top panel shows: DATA ADDRESS Indicators labeled 2048 and 4096
A/B memory sections. …

mhs-2026.64.jpg
Photograph showing the inside of several PDP-9 cabinets. The Digital Equipment Corporation's PDP-9, a minicomputer that was introduced in 1966 and used discrete transistor logic.

mhs-2026.63.jpg
A marketing/catalog photograph of Digital Equipment Corporation's PDP-9, a minicomputer that was introduced in 1966 and sold about 400 units.