The origins of generations following Generation X are much less clear. In the early 1990s, the children born post-Gen X were often referred to as Generation Y by media outlets like Advertising Age, which is recognized as being the first to use the term in 1993. But by the mid-90s, amidst commotion about the turn of the 21st century, this generation was more often referred to as Millennials, a term Howe and Strauss first used in their book. There is now a Generation X and a Millenial generation.