This volume is an explicit summary of the phonological histories of Beijing and Cantonese dialects, based on earlier accounts proposed by Matthew Chen and John Newman and which appeared in the Journal of Chinese Linguistics (1976, 1984/1985). Approximately 2,700 characters appear here with their Middle Chinese reconstructions (the 'Simplified Middle Chinese' reconstructions proposed by Chen) and arranged by their Middle Chinese rime, initial, and tone class. For each character, the complete derivations (as sequences of rule labels) from Middle Chinese to Beijing pronunciation and from Middle Chinese to Cantonese pronunciation are given, including indications of exceptional application or non-application of rules. A full statement of the regular phonological rules referred to in the derivations is provided. The meanings of the characters (in English) are also included. A Hanyu Pinyin-Middle Chinese index enables the reader to determine the Middle Chinese reconstruction from the Hanyu Pinyin representation. The detail of Beijing and Cantonese phonological histories is here made accessible to linguists outside the specialist field of Sinology. The material is explicit, comprehensive, and transparent in a way which will be appreciated by Sinologists and non-Sinologists alike. The enclosed disk contains the data relevant to Part 3 of Newman and Raman's "Chinese Historical Phonology". In particular, it contains approximately 2,700 Chinese characters (as encapsulated Postscript files), Simplified Middle Chinese reconstructions, the modern reflexes of these reconstructions in Beijing and Cantonese dialects, and the sequences of phonological rules to derive each of the modern reflexes. The material allows one to carry out original computational linguistic tasks on the data, such as searches for phonetic forms, rules, sequences of rules, and exceptions to rules. The data has been compiled for LaTeX (a free and easily downloadable software application) and users should have this software to enjoy the full benefit of the diskette. However, the files can also be opened and edited using ordinary text editors. The fonts are transcribed for processing with wsuipa, the Washington State University's IPA font for LaTeX. Characters and phonetic transcriptions do not appear as such on screen, but can be printed out as in Newman and Raman's book. Available for both PC and Mac.