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He is best known as the father of removable disk storage for his leadership of the 1311 Disk File project , but he considered the 1350/1360 ( Cypress ) Image Storage System his most challenging assignment and the creation of the Technology and Advanced Development Group ( TAD ) in 1969 amongst his most important accomplishments .
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Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities:  
Answer:
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