Definition of "Dvorak"

A surname from Czech.  examples

(computing, typography) Describing an optimized keyboard layout for the English language, in which the alphabet is arranged in the order PYFGCRL on the top row, AOEUIDHTNS on the middle, or home row, and QJKXBMWVZ on the bottom row, thus placing the letters most frequently used in the home row. Many variants on Dvorak layouts also exist, including keyboards for right-hand-only and left-hand-only-typists.  examples