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Whereas early missions sent their data uncoded , starting in 1968 , digital error correction was implemented in the form of ( sub-optimally decoded ) convolutional codes and Reed–Muller codes .
 Reed–Muller
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Reed–Muller