Jeffy is correct. KISS stands for "Keep It Simple, Stupid." Kelly Johnson, the head of Lockheed's Skunk Works, used to use it all of the time to prevent his engineers from overthinking things. The KISS principle has become ingrained in the American engineering community. The first thing I used to do when I received a fresh-out computer engineer or computer scientist was to drive this principle home. Keeping things simple results in a more verifiable product that has a lower defect rate.