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Dennis Ritchie, Ken Thompson, and UNIX System, 1972

Here's a publicity photo from about 1972, showing Ken and Dennis in front of a PDP-11. From the right, the major items of equipment are

At the far right, on the table, are what someone discerned was a VT01A storage-tube display (based on Tek 611) and a small keyboard for it. Slightly hard to make out.

A main CPU cabinet, partly behind the table. The processor is a PDP-11/20; it must have been our second one, with the Digital Special Systems KS-11 memory management unit. Our very first just said "PDP11," not "11/20." The arrays of distorted rectangles above it and in other cabinets are the labels on DECtape canisters.

Another cabinet. Careful examination of the image by Steve Westin detects the top of the bezel of an 11/45 CPU barely peeking above the TTY to the right of the one Ken is typing at. A paper tape reader is above it.

The third cabinet sports a dual DECtape drive at the top.

A cabinet with another DECtape drive, probably also containing BA-11 extension boxes within.

A cabinet with RK03 disk drives. These were made by Diablo (subsumed by Xerox) and OEMed to Digital. Digital later began manufacturing their own version (RK05).

A cabinet containing RF11/RS11 controller and fixed-head disks. By this time / and swap space lived there, while /usr was on the RK03s.

On top of the machine are what look like magtapes. A probable TU10 transport is barely visible just below Ken's chin.

In front, we have

Ken (sitting) and Dennis (standing), both with more luxuriant and darker hair.

Two Teletype model ASR 33 terminals.

(Photo and description courtesy of Dennis Ritchie.


Continue to Berkeley UNIX, 1979-1984



[The Stargate Internet Museum] [Tour the Museum] [The UNIX License] [Did Al Gore Invent the Internet?] [The ARPANET, 1969-1982] [Early UNIX Development] [Dennis Ritchie, Ken Thompson, and UNIX System, 1972] [Berkeley UNIX, 1979-1984] [UUCP and E-mail] [Usenet, 1979] [Early MS Windows 1.0] [The UUCP Project, 1984] [CUBIX Computer] [Stargate Project] [UNIX PC, 1985] [.COM Created] [SPARCstation 1, 1992] [A Merger] [Epilogue]