Any method used to organize and look up characters in a dictionary or index, such as by radical, phonetic order, or the four-corner system

index or list used for looking up characters in a dictionary

A lookup table or index for finding Chinese characters based on their stroke count and radicals.

A method for looking up Chinese characters in a dictionary by counting their strokes; entries are arranged by total stroke count, often followed by radical order within the same stroke count

A method of looking up Chinese characters in a dictionary by grouping them according to their shared radical and counting their remaining strokes.