This document discusses different types of projects and why it is important to understand the differences. It describes short term versus long term projects, large, medium and small projects based on resources, teams, deliverables and timeframes. Project types are also classified by area such as technical, organizational, economic and social. Sequential projects must be completed in order while parallel projects allow concurrent tasks. Internal projects support a company's operations while external projects are done for outside clients. Understanding project types helps with strategic planning, identifying teams, success metrics, methodology, risk assessment, budgeting and feedback strategies.