Death Star supersite for old docs is bitsavers.org.
It doesn't have much consumer tech - Spectrum, Amiga, Atari, Apple - but it does have a lot of mainframe and mini manuals and docs, quite a bit of a S100 and PC, and even a few internal development and strategic memos and other historical docs from some of the major manufs.
In passing - minor grammar nitpick for OP. In a couple of places you've written "than what", which is not commercial English. "Than" is better on its own.
Wow, thanks, turns out bitsavers has firmware and information about a thin client terminal I recently was tinkering with. Neato! Actually want to contact the owner as, in the photos, the serial number of their device is 2 digits off from mine, interestingly!
It doesn't have much consumer tech - Spectrum, Amiga, Atari, Apple - but it does have a lot of mainframe and mini manuals and docs, quite a bit of a S100 and PC, and even a few internal development and strategic memos and other historical docs from some of the major manufs.
In passing - minor grammar nitpick for OP. In a couple of places you've written "than what", which is not commercial English. "Than" is better on its own.