The keyboard is the primary input device for entering data and executing commands. Most of the keys on the keyboard are laid out like the keys on a typewriter. But there are some special keys like Esc (Escape), Ctrl (Control), and Alt (Alternate). Computer keyboard vary in design, but all have the same type of keys.
Types of Keyboard
A standard computer keyboard is called a QWERTY keyboard because of the layout of its typing area. This keyboard is named after the first six leftmost letters on the top alphabetic line of the keyboard. A QWERTY keyboard might limit your typing speed.
A keyboard with an alternative layout was designed to improve typing speed. Called the Dvorak keyboard, this type of keyboard places the most frequently typed letters in the middle of the typing area.