The document discusses different types of technical reports, including informal reports and formal reports. It describes various informal report formats like blank forms, pre-formatted forms, interoffice memorandums, and letters. It also discusses different types of informal reports like field trip reports, progress reports, status reports, periodic reports, feasibility reports, and troubleshooting reports. For formal reports, it outlines the typical three-part structure including preliminary information, body, and end matter. It provides guidance on style elements like completeness, uncluttering, impartiality and interest to ensure effective report writing.