Imagesource: https://arstechnica.com/

The PDP-11 was DEC’s most successful minicomputer. Over 600’000 units were sold between 1970 and 1990. This is no wonder, since the PDP-11 was way ahead of its predecessors - especially the PDP-8. Additional registers, an innovative instruction set and a bus system that allowed access to peripherals via DMA.

ARS contributor Andrew Hudson has taken the machine's former popularity as an opportunity to publish a small tour of the PDP-11 at arstechnica.

The article is indeed anything but short, and anyone who has worked with this machine, or who is simply curious, will find plenty of information, skillfully and competently compiled.

Definitely worth reading.