With over 12,000 mutual funds, how and where do you start the process of categorizing them all? This presentation discusses the most important mutual fund categories. We start with the most riskiest mutual funds and work our way through to the least riskiest. We end with discussions of lifestyle (a.k.a. target date) funds, index funds, ETFs (exchange-traded funds), and some of the more off-beat and arcane mutual fund categories.