As someone who runs a small computer museum this is really interesting. I wish more people would have stuff from there past : I'm sure many do but never post about it. These things belong in the not for profit museums around the world. Usually stuff like that is tossed out in the garbage by the kids or grandkids and that's a real shame. I manage to catch a few of these before that happened: lot of love went into those machines. Anyway if you ever want to do something nice with 70s or 80s computers you want to throw out just ask a local museum.
Fantastic notes (in the PDF linked to). These, coupled with the Usborne 80s computing books recently released[0], really take you back to a different time.