Dunno what Plan9 is... OS9 was an optional os for tandy Color Computers developed by microware. A small footprint simple unix-like os that ran well on 6809 chips and multitasked. It even had a windows routine, MultiVue, for the COCO3 anyway. The manual came with all the C (no + or ++) for the windows s/w. @lamp @bookstodon @histodons @academicchatter @actuallyautistic @palestine @infodump