This document provides an overview of turning products into companies by closing the "product company GAP." It discusses designing products for market fit by focusing on a primary value proposition for a single audience. It introduces the concepts of minimum viable product, minimum viable segment, and minimum repeatable product to test market fit in smaller segments. The document also discusses architecting business models, including designing "slippery" products, and using Russian doll pricing and packaging strategies. The goal is to help startups transition from developing products to building successful companies by considering business model, go-to-market strategy, and how the product will influence these from the beginning.