This document discusses business-to-business (B2B) marketing. It begins by outlining the key learning objectives which are to describe B2B market segmentation, the B2B buying process, roles in the buying center, organizational cultures, and buying situations. The document then provides an overview of the various B2B markets including resellers, institutions, government, and manufacturers/service providers. It also outlines the stages of the B2B buying process and factors that influence it.