The document provides a classification of products based on durability, shopping effort, and end use. It divides products into durable and non-durable categories based on whether they last over 3 years or are immediately consumed. Shopping effort categorizes products as convenience, shopping, or specialty goods based on how much effort consumers put into purchasing decisions. Industrial products include materials and parts, capital goods, supplies, and services and are defined as goods used in or facilitating production but not becoming part of the finished product.