Non-fungible tokens (NFTs) are the latest advancement in the ongoing evolution of the blockchain market. To help put this new phenomenon into context, the BakerHostetler Blockchain team has prepared a series of papers that examine NFTs from various perspectives. In the first paper in the series, we introduce NFTs from the technological and market perspectives. Forthcoming papers will rely on the concepts in this introduction as we analyze the multiple legal issues arising from this new technology.