This document provides an overview of technical and scientific writing. It defines technical writing as writing that aims to get work done by changing how people do things. Technical writing takes complex information and makes it clear for lay audiences. The document lists many common types of technical communication materials and who creates them, including technical communication professionals and other professionals. It outlines some key differences between academic and technical writing, such as audience and purpose. The document also lists major traits of technical writing and its three primary purposes: to inform, persuade, and instruct.