Ok, never had original IBM PC and all 286 by other manufacturers I have seen had AT compatibility.
Actually IBM had a 286 XT :) I studied in a 286 XT, worked in a 386 AT and my first pc was a 486 sx33
https://en.wikipedia.org/wiki/IBM_Personal_Computer_XT#IBM_XT_286
Ok, never had original IBM PC and all 286 by other manufacturers I have seen had AT compatibility.
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