BTW, it's "kudos". The OS for the machine Linus Torvalds started on, the Sinclair QL, was called QDOS as a pun. The original codename for 86DOS, which became

BTW, it's "kudos". The OS for the machine Linus Torvalds started on, the Sinclair QL, was called QDOS as a pun. The original codename for 86DOS, which became MS-DOS and made Microsoft rich, was also QDOS, for the same reason. Because cue-doss sounds like "kudos".