This document discusses industrial segmentation, including the different approaches and types. There are several approaches to segmentation, including two-stage (macro then micro), nested, and bottom-up approaches. The main types of segmentation are market segmentation, customer segmentation, and product segmentation. Market segmentation divides the market based on geography, demographics, psychographics, and behavior. Customer segmentation divides customers based on factors like age, interests, and spending habits. Product segmentation classifies products according to customer needs. Examples of industry segments discussed include communication, gaming, banking, and manufacturing.