Intii lagu guda jiray mashruucan, waxaa la doortay magac cusub, ReactOS. Mashruucu wuxuu bilaabay horumarinta bishii Febraayo 1998 isagoo aasaasay aasaaska kernel cusub iyo darawallada aasaasiga ah. Magaca ReactOS waxaa la sameeyay intii lagu jiray wada sheekeysiga IRC. In kasta oo ereyga "OS" uu u taagnaa nidaamka qalliinka, ereyga "react" wuxuu tilmaamay qanacsanaanta kooxda ee <unk> iyo falcelinta <unk> ee booska monopolistic ee Microsoft.
NT qalab cusub iyo darawallada aasaasiga ah