According to Joel[1] it was originally about distinguishing variables that had the same type but had different semantics, e.g. a window's width (dx) vs its hori

According to Joel[1] it was originally about distinguishing variables that had the same type but had different semantics, e.g. a window's width (dx) vs its horizontal position (x). Both ints, but not really the same kind of data. [1] https://www.joelonsoftware.com/2005/05/11/making-wrong-code-look-wrong/ https://www.joelonsoftware.com/2005/05/11/making-wrong-code-...