Portrait PDF
Landscape PDF
A4 Landscape PDF
Preliminary by category (rough, incomplete): PC/DOS/Windows systems Mobile systems (does not include Android or Apple iOS as they are Unix-based)
Homebrew 8/16 bit
Embedded
Modern with history
Please note that the diagrams are quite large PDF files, they are not designed to be viewed on historical systems.
This is work in progress. It was inspired and is based on non-Unix OS History by Patrick Mulvany. For Unix history see this page.