Introducing RISC Processors (1986)
From 1986 but few people in IT still today understand RISC and computing architectures. RISC is still very important today with ARM, Power and Sparc all being RISC and the AMD64 being heavily influenced.
That HP processor that they talk about is the famous PA-RISC that was amazing for nearly two decades. I have one still! Screaming machines. HP-UX used to come on these.
Not as interesting as some of the others that you have been finding.