3 ms·...meaning MS-DOS compatible :) I.e.: runs Alley Cat and Dune 2 - and Doom.by DrNosferatu 1y ago...meaning MS-DOS compatible :) I.e.: runs Alley Cat and Dune 2 - and Doom.JdeBP 1y agoAnd prevents Lotus 1-2-3 from running? (-:vardump 1y agoThat's the litmus test. No version of DOS is complete until Lotus 1-2-3 no longer runs.