First time --> Basic (???)(Amstrad CPC464) --> MS DOS
Windows --> 3.11 (yes, 3.11)-> W95 -> W98 -> Win Me -> Win XP -> Win 7 -> Win 10 (only for some games)
GNU/Linux --> (2013) Mint -> Debian ->Manjaro (2-3 days) -> POPos (2-3 days) -> Mint -> Nobara --> Fedora (last Year)