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In recent years, there has been a growing interest in analog records. Not only individuals but also libraries and museums have commented that they possess old records, but do not know the dates or the meanings of the symbols. This book was born out of such voices in the field. How to interpret SP records as historical materials, which are difficult to be treated as academic historical materials because of their high level of interest. This book is an SP record guidebook that advocates "record archival science" that makes use of old records to the present day, and explains how to handle SP records, history, and the current status of databases.