via https://www.nokia.com/bell-labs/about/dennis-m-ritchie/picture.html :
An amusing photo
Here's a publicity photo from about 1972, showing Ken and me 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, at least if you have the monitor brightness and contrast adjusted favorably.
In front, we have
- Ken (sitting) and me (standing), both with more luxuriant and darker hair than we have now.
- Scientific American March 1999 p. 48 should have checked the IDs; we're interchanged in its caption of this same picture.
- Two Teletype 33 terminals
If you want a giant (2.1 MB) JPEG version at higher resolution, click here.
More pictures of PDP-11 equipment are available in John Holden's collection.
Nice post. Relatedly, see also malus.sh and this talk by the people that made it (both of which I posted in this lemmy community here).
A couple of minor corrections to your text:
Blanchard doesn't say that he never looked at the existing code; on the contrary, he has been the maintainer (and primary contributor) to it for over a decade so he is probably the person who is most familiar with the pre-Claude version's implementation details. Rather, he says that he didn't prompt Claude with the source code while reimplementing it. iirc he does not acknowledge that it is extremely likely that multiple prior versions of it were included in Claude's training corpus (which is non-public, so this can only be conclusively verified easily by Anthropic).
The GPL does not require you to offer GPL-licensed source code when using the program to provide a network service; because it is solely a copyright license, the GPL's obligations are only triggered by distribution. (It's the AGPL which goes beyond copyright and imposes these obligations on people running a program as a network service...)