On 14 Jul 2021 22:21 -0400, from douglas.mcilroy(a)dartmouth.edu (Douglas McIlroy): More recently than that, for the original IBM PC anyone could get (I believe) the complete schematics, detailed technical information, and a commented ROM BIOS source code listing just by purchasing their Technical Reference for, what, $50 or thereabouts? It certainly wasn't open source according to the Open Source Definition, but it certainly was _available_ to anyone who wanted a copy. What kind of company does that today, in a similar market segment? -- Michael Kjörling • https://michael.kjorling.se • michael(a)kjorling.se “Remember when, on the Internet, nobody cared that you were a dog?”