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Policy makers across the world have recognised the importance of access to ( digital ) television for citizenship in the Information Society : History Despite the fact that text-to-speech technology has been under development since the early days of computer science , it was not until the 21st century that text to speech products for digital television became publicly available on the high street .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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