AmigaOS still has a special place in my heart, probably the most elegantly designed piece of software I've ever seen (apart from that ugly DOS part of course wh

AmigaOS still has a special place in my heart, probably the most elegantly designed piece of software I've ever seen (apart from that ugly DOS part of course which was shoehorned in because of deadline pressure). There was a single fixed location in the entire system (address 0x4 aka ExecBase), and everything an AmigaOS application required was 'bootstrapped' from that one fixed address. All OS data structures were held together by linked lists, everything was open and could be inspected (and messed up - of course terrible for security, but great for learning, exploring and extending).