This document discusses interorganizational systems (IOS) and e-commerce. It defines IOS as occurring between two or more organizations collaborating and sharing information. It describes different levels of IOS including individual organizations, networks themselves, and wider communities. It also outlines types of IOS at different technological stages from pre-internet to modern web 2.0 systems. Key benefits of IOS include enabling efficient supply chain management, facilitating technology exchange, allowing for global communication, and reducing business risks.