Wikipedia:WikiProject Introductions/Sample intro

A typewriter is a mechanical, electromechanical, or electronic device with a set of "keys" that, when pressed, cause characters to be printed on a document, usually paper.(Exactly what a typewriter is)

In the late 19th century and at the start of the 20th century, a person who operated such a device was sometimes called a typewriter but it then became more common to call the person a typist. (A summary of important info)

For much of the 20th century, typewriters were indispensable tools in business offices and for many (if not all) professional writers. (Shows notability) By the 1980s, however, word processor applications on personal computers largely overtook the tasks previously accomplished with typewriters. However, typewriters are still popular in the developing world and among some niche markets. (Important points)