This document discusses different types of short, informal reports including incident reports, investigative reports, trip reports, feasibility reports, meeting minutes, and progress reports. It provides examples of each type of report and outlines the typical structure and content, which usually includes an introduction, body, and conclusion. The document also provides general tips for writing short, informal reports such as using a straightforward style and proofreading to ensure the report is well-packaged and presentable for the intended audience.