Four Corners Input System
• Called 层次四角 in Chinese
• Another 形码 input system
• 1920s: invented by Editor in Chief of
the Commercial Press Ltd, China
(Y.W. Wong)
• 1928: Wong’s System for Arranging
Chinese Characters: The Revised
Four Corner Numeral System
published in Shanghai
• Based on shape of four corners of
characters
• Number assigned to groups of
distinctive shapes
– Characters arranged according to
four numbers that represent
corners
• Rhyme that describes method
– Can input speedily any Chinese
character once learnt