The moving head of an electric typewriter machine in use typing words. After their invention in the 1860s, typewriters quickly became indispensable tools for practically all writing other than personal correspondence. They were widely used by professional writers, in offices, and for business correspondence in private homes. By the end of the 1980s, word processors and personal computers had largely displaced typewriters in most of these uses in the Western world, but as of the 2010s the typewriter is still prominent in many parts of the world including India. Sound included.