Current Usage
The main purpose of the original four-corner system today is in doing academic research or handling large numbers of characters, terms, index cards, or names. It is also used in computer entry, where a smaller list of items is created to browse from than with other systems. The Xinhua Zidian large type edition is available with a four-corner index for those whose failing eyesight precludes browsing and counting strokes.
In China today, many famous KMT period reference books and collections with four-corner indexes are being reprinted for sale to scholars and those interested in Old Chinese language or historical studies.
Read more about this topic: Four-Corner Method
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