 Two outstanding achievements in contemporary Chinese lexicography are the (1986–93) "Hanyu Da Cidian" (漢語大詞典 "Comprehensive Dictionary of Chinese Words") with over 370,000 word and phrase entries listed under 23,000 different characters; and the (1986–89) "Hanyu Da Zidian" (漢語大字典 "Comprehensive Dictionary of Chinese Characters") with 54,678 head entries for characters.They both use a system of 200 radicals.In recent years, the computerization of Chinese has allowed lexicographers to create "dianzi cidian" (電子詞典/电子词典 "electronic dictionaries") usable on computers, PDAs, etc.