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Al-Uqlidisi then invented a system of calculations with ink and paper " without board and erasing " ( " bi-ghayr takht wa-lā maḥw bal bi-dawāt wa-qirṭās " ) .
 Al-Uqlidisi
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Al-Uqlidisi