Electric typewriter : Electric typewriters are similar to standard typewriters but with an electronic motor taking the place of human energy. It is much faster than the standard model. They can produce up to 20 copies of a document if paper of appropriate thickness is used. The slightest touch of fingers sets the keys in motion and the impressions produced are uniform and perfect. Electric typewriters are commonly preferred because of the speed of typing, fineness and uniform quality of the print. Besides they are good for cutting stencils, typing, invoices and preparing material for printing.