In article <207E4E4F-B642-424E-8649-810A589DA54B@delong.com>, Owen DeLong <owen@delong.com> writes
I believe the IPv4 classful addressing scheme (which some have pointed out was the second IPv4 addressing scheme, I wasn't involved early enough for the first, so didn't remember it) predates commodore, apple, etc.
On a historical note, if Classful Addressing is deemed to date from rfc792 (1981) [but I'd be grateful for other nominations of a suitable alternate date] then that post-dates the Commodore PET and Apple II which were both launched in 1977. Some sources claim the PET is later, but I remember it because I was doing a project on "PCs in Schools" in the spring of 1977, using an 8-bit PC that I had built myself on a patchboard. And the PET arrived just in time for me to be able say to "I'm not completely insane - a viable PC you could install in a school is now commercially available". -- Roland Perry