The KISS principle (“keep it simple, stupid”) is not new to the tech world. It’s the basis of many successful innovations. The principle is somewhat similar to Occam’s razor (“entities should not be multiplied beyond necessity”), and Albert Einstein’s maxim that “everything should be made as simple as possible, but no simpler.” But when I had a look at this example of simplicity, it made my head spin, retrospectively. Strangely, sometime back, there was a cosmetics advertisement on the telly, with the tagline “less is more”. Developers, keep away from the mascara!