QWERTY layout was specifically designed for typewriter typists. The basic design principle was to make distance between the letters to avoid accidental hit of the wrong letter and slow down the typist for a while and then increase the speed. It is the most popular and standard keyboard layout among computer users, typewriters, laptops, tablets, and smartphones. It has been named QWERTY as its top row contains the letters Q, W, E, R, T, and Y. A QWERTY’s layout keyboard is shown in Figure 1. If you don’t have a QWERTY keyboard, you may get one here.