A technical writer is a professional writer who engages in technical writing and produces technical documentation that helps people understand and use a product or service. This documentation includes online help, manuals (system, end-user, training), white papers, design specifications, project plans, test plans, business correspondence, etc. With the rise of e-learning, technical writers are also charged with creating online training for their audience of learners. Technical writers explain technologies, processes, and products in many formats, including print, online, and other electronic means.Kurt Vonnegut described technical writers as:"..trained to reveal almost nothing about themselves in their writing. This makes them freaks in the world of writers, since almost all of the other ink-stained wretches in that world reveal a lot about themselves to the reader." Engineers, scientists, and other professionals may also produce technical writing, but often hand it off to a professional technical writer for developmental editing, proofreading, editing, formatting, and delivery to their audiences.