A typewriter is an old-fashioned machine for printing letters, school assignments, and other written works. Each key on a typewriter prints a single letter, number, or symbol in ink on a piece of paper.
There are similarities between a computer keyboard and a typewriter — you use both by pressing one key at a time. But instead of watching a cursor move across a screen as you type (moving backwards easily, automatically deleting mistakes), a typewriter makes a physical mark on paper. Instead of printing your letter out (or emailing it), when you use a typewriter, you create the final product as you go, simply pulling it out of the typewriter when you finish.